November 13, 2024
Project Gallery: Gifu Collection of Modern Arts, etc.
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Project Gallery: Gifu Collection of Modern Arts, Toko Gallery
Project Gallery: SHINSUI Building
November 13, 2024
The following contents have been updated.
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Project Gallery: Gifu Collection of Modern Arts, Toko Gallery
Project Gallery: SHINSUI Building
October 22, 2024
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Project Gallery: Furukawa Manufacturing Head Office
October 18, 2024
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Project Gallery: FREUDE by BMW
October 10, 2024
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Project Gallery: CareRitz Technologies Head Office
September 30, 2024
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Project Gallery: Azabudai Hills Arena, “The Cloud”
Project Gallery: Hokuhoku Sapporo Building
Project Gallery: Azabusan Zenpukuji Temple, Kaizan-do Hall
Project Gallery: ANNIVERSAIRE OMOTESANDO
June 21, 2024
Listing updated or added content during 2024.
17 June 2024 Project Gallery: ONE SAPPORO STATION TOWER
22 May 2024 Project Gallery: JA Tokyo Smile, Mizumoto Branch
16 May 2024 Project Gallery: SHIROKANE THE SKY
10 May 2024 Project Gallery: AIRSIDE, “Kai Tak Turn”
8 April 2024 Project Gallery: The Tokyo Higashi Shinkin Bank
21 February 2024 Project Gallery: Landport Yokohama Fukuura
14 February 2024 Project Gallery: MGC Commons
23 January 2024 Project Gallery: COMFY COLLECTION MINATO
12 January 2024 Project Gallery: G PLATE kitashinchi 8
22 December 2023 Project Gallery: Tsuru University, Tsuru Humanities Center
January 10, 2024
For any store or office, the entrance plays a crucial role as the first structure that greets customers and visitors. This is precisely why many owners and designers pay particular attention to entrance design. Here is an example of an impactful entrance that embodies the vision of a client.
LÝFT GÝM is a members-only fitness club located on the third basement floor (B3F) of the Main Building of Omotesando Hills, a commercial complex in Tokyo. KIKUKAWA fabricated the uniquely shaped wall screen that now forms the entrance to the gym floor via the gym reception.
The overall size of the wall screen is 7.4m wide by 4m high. Polygonal panels in stainless steel and glass have been fitted into a frame constructed from intersecting stainless steel square tubes. The screen is also soundproofed: two 1.5mm-thick stainless steel panels were installed inside the cavity of the 75mm-thick screen, to sandwich glass wool (a fibrous material with excellent heat insulation and sound absorption properties). The wall screen needed to perfectly seal the wide open area; this required high levels of precision in both fabrication and installation.
The focal point of this entrance design is a polyhedral three-dimensional feature panel, set around the doors. This was designed using 3D-CAD. This highly impactful design sees the polyhedral shape protrude some 765mm from the wall at its highest outermost point. The panel is comprised of 17triangular panels, each 3mm thick and crafted in various sizes from stainless steel.
Not only did this project have a short lead time, the three-dimensional shape also had tight joints requiring hidden screws. As such, we needed to address a number of challenges, both at the design and fabrication stages.
When designing the sharp, mineral stone-inspired shape of the entrance, particular attention was paid to safety, given that an entrance is by nature used by many people. We created mock-ups of the three-dimensional part, in order to study which shape could best strike a balance between design and safety. We also neatly chamfered the panel corners to reduce any risk from contact.
A Permanent Hairline / Vibration (PHL) surface finish was applied to the stainless steel panels. This imparts a highly metallic shine, as a result of fine grind marks that sparkle under lighting. The grind marks of a PHL finish are also comparatively inconspicuous, which makes PHL ideal for high contact fixtures.
Click here to learn more about PHL (Vibration) Finish
In a video released when the gym was opened, the gym owner explains how he is “so glad we commissioned this” and talks about how pleased he is with the results.
Click here for the video (in Japanese, entrance discussed from 2:16-3:00).
Polyhedral designs for interiors and exteriors, such as those featured in this project, combine well with metal materials able to evoke sharpness and definition. KIKUKAWA has proven experience with this type of fabrication and installation. Please feel free to contact us to discuss your project needs.
Click here for project examples of both exterior and interior use of polyhedral shapes
・Tokyu Plaza, Omotesando Harajuku
・Tokyo International Airport (Haneda) Terminal 2, International Flight Facilities
・Sundai Preparatory School, Kashiwa
・Sumitomo Fudosan Azabu Juban Building
December 21, 2023
Listing updated or added content during 2023.
29 November 2023 Project Gallery: Tampa International Airport, “HOME”
23 October 2023 Project Gallery: Kyoto Prefectural Office Building #3
17 October 2023 Project Gallery: TOKYU KABUKICHO TOWER
21 September 2023 Project Gallery: Hakusuisha
15 September 2023 Message from the President
4 August 2023 Project Gallery: Merchandise Shop in MAZDA Stadium
28 July 2023 Project Gallery: EPIC TOWER SHIN YOKOHAMA
15 June 2023 Project Gallery: Mercedes-Benz Chiba-Chuo
19 April 2023 Project Gallery: SHIONO KORYO Tokyo Office “s+park”
10 March 2023 Project Gallery: 30 St Mary Axe (The Gherkin)
8 March 2023 Project Gallery: OKAMURA We Labo
13 February 2023 Project Gallery: FLOTT Seijo
8 February 2023 Project Gallery: PORSCHE Showroom
16 January 2023 Project Gallery: DAIKANYAMA SALON
July 18, 2023
Metal materials can be presented and transformed in countless ways through the selective application of different processes and finishes. This makes metal an ideal material for use in artworks and monuments. Here we will introduce a moon-inspired artwork crafted in copper.
Tokonoushin is a kaiseki (traditional multi-course dinner) restaurant specialising in meat dishes, located in the Omiya Mongai multi-purpose complex near Omiya Station in Saitama. The restaurant’s name means “to take out the old and bring in the new”; the name was chosen by the owners in the hope that a visit to their restaurant would allow diners to discard any negativity from that day and instead make new, positive memories.
The copper artwork displayed at the entrance was designed to bring a representation of that concept into the restaurant space. The moon, as a symbol of renewal and cyclicality, is depicted in copper, a material which, like the moon, can transform into various appearances. The artwork was designed by Mai Unaki of club Mai architects, a first-class certified architectural firm.
Various processes and finishes were applied to a copper plate, 900mm in diameter and 2mm in thickness, to evoke the patterns of the moon’s surface. Some peripheral parts of the plate were polished to draw out the luminosity of copper, while other parts were treated by blasting followed by a Tsuchime (hammertone) finish. We adjusted the density of the hammertone pattern to achieve a gradation-like effect. For the central part of the plate, we applied a base pattern of crossed hairline (HL) grind marks, both vertically and horizontally, followed by a permanent hairline (PHL) finish. The patterned accent pieces, designed to evoke nebula, were hand-crafted by artisans and finished with bespoke polishing. This single artwork features multiple finishes, each of which showcases brilliant craftsmanship.
The subtle patterning visible across the moon, sometimes called the lunar maria or likened to the shadow of a rabbit, was recreated through the intricate laser cutting of a 2mm-thick copper plate. Our FURUMI sulphurisation finish, which recreates the effects of aging on copper, was then applied in two shades, along with a patina effect paint finish in a dark green tone. These parts were affixed at varying heights (4mm, 8mm, 12mm) to the base plate to create a floating, 3D effect.
Metal fittings were attached using studs to the back of the base copper plate, and the artwork was then affixed to a backing plate mounted on the entrance wall. We also undertook repeated testing of the lighting method to complete this floating moon monument.
As this project shows, the beauty of metal is that the same material can be worked in different ways to draw out different expressions. At Kikukawa, we are able to draw upon our vast experience, honed through tailor-made production, to examine the wide range of options available and propose optimal ways to use metal materials to achieve the desired effect for any project.
April 11, 2023
KIKUKAWA, a bespoke metal architect for interiors and exteriors, released an updated version of our Aluminium Sample Book on March 1, 2023. The updated version features 16 of our aluminium finishes and includes some of our new finish options.
The featured samples have been selected as a visual showcase of the diversity of our aluminium finishes and represent some of the most decorative finish options we offer. Ten of the samples are new additions to the Aluminium Sample Book, including: finishes from our Alumiére®* range, which are designed to add shine and texture to luminous aluminium alloys; a perforated finish, which makes maximum use of the high processability of aluminium; and an embossed finish that evokes cast metal.
Popular finishes from the previous version of the Aluminium Sample Book, including those used in projects such as the Sumida Hokusai Museum and the Tokyo Metropolitan Teien Art Museum, are also listed in this new edition.
Through our extensive experience to date of projects tailored to client specifications, KIKUKAWA is able to propose various combinations from our wide range of finishes and processing options to best meet client needs. We are also highly adaptable, which enables us to make tailored adjustments to colour tone and shine. Aluminium finishes are a great choice for both interior and exterior applications.
Through this new edition of the Aluminium Sample Book, we intend to widen the selection of aluminium as a building material with various potential looks and in doing so increase the breadth of design options available to clients such as project owners, developers, architects and designers.
*Alumiére®: a Kikukawa original range of finishes designed to add gentle shine and polished textures to aluminium.
■Aluminium Sample Book: The new line-up of finishes
・Defined PHL (vibration) + Anodization (silver / silver tone / black)
・Bright Aluminium alloy + Electrolytic polishing + Anodization
・Anodization + Dyeing (gold) + Clear Coating
・Anodization (black) + Clear Coating
● Alumiére® (6 finishes)
● Tsuchime (Hammertone) + Clear Coating
● Bespoke perforation + Anodization (white)
● Defined PHL + Colour Clear Coating
● ‘Rough Tone Metal’ R Series + Anodization (light brown)
● denotes new additions to the listed finishes.
*Please note that workable panel thickness and size differs for each finish.
Click here to learn more about Kikukawa’s Finish Samples -Aluminium
March 31, 2023
A feature ceiling crafted in metal brings a distinguished impression to an interior space. This works for entire areas of all ceilings, but partial use for standard boarded ceilings and system ceilings would also create a focal point. In this example, we will look at a decorative ceiling introduced into an office space.
This ceiling was installed in the headquarters of Remedy & Company Co., Ltd., a company engaged in pharmaceutical development. The office is located on the 23rd floor of Tokiwabashi Tower, a multi-purpose building situated in front of Tokyo Station. KIKUKAWA installed a glamorous and lustrous decorative ceiling in the entrance lounge, to match the concept of the office as an “Innovation Gateway”.
This feature ceiling is parallelogram in shape and sized around 5,200mm x 3,200mm. It is finished in our “High Bright Silver Colour Hammertone”, one of the options available for our Alumiére® range of luminous anodized aluminium in textured finishes.
The ceiling is composed of ten cut panels, each 3mm-thick. The largest panels are approx.1,000 mm x 3,600 mm, which is relatively large for a Hammertone finish. The panels were installed using a clip-type fitting, which enabled a slim 3mm joint that didn’t impair the overall look.
The perimeter comprises upstand panels in the same Hammertone finish and recessed closing panels in steel painted in black, at a width of 150mm and surrounding all four sides. LED lighting has been installed both behind the ceiling panels and in an integrated 55mm-wide slit to make the decorative ceiling stand out.
The client for this project was originally interested in our Minamo® range of water ripple panels in mirror-polished stainless steel. Since this was for a ceiling, as a comparatively lightweight alternative we suggested our “High Bright Silver Colour Hammertone” finish in aluminium, which is high-gloss, and presents a concave-convex texture. In comparison to the Minamo® range, this finish offers a more delicately textured surface and softer reflective properties, which convinced the client ultimately.
Click here to learn more about the Alumiére® range
Click here to learn more about the Minamo panel® range
This was the first project to feature Aluméire’s High Bright Silver Colour Hammertone finish on a large scale and shows how the textured Hammertone finish can soften the tone and reflection of light. This is a perfect example of how you can incorporate the refined shine of metal into your project.
January 24, 2023
In recent years, KIKUKAWA has received an increasing number of enquiries about renovation work using metal panels. At KIKUKAWA, we can update buildings with a unique look with our special coating technology.
The below introduces a renovation project on the entrance to an office building in Morioka City, Iwate Prefecture. KIKUKAWA fabricated inner and outer panels, finished in a paint that recreates the look of a casted surface.
The front of the exterior wall panels features a sign panel along the centre, sandwiched by six cut panels of around 1000mm (W) x 1300mm (H), screwed together and featuring 15mm-width joints. As a result, the entrance has been given an entirely different look, with the brown stone tone being changed into in chic black wall panels.
The panels are finished in Casted Paint (CM-C1), one of KIKUKAWA’s special custom paint finishes. The paint recreates the rough texture of cast surfaces by using matte black urethane paint. The resulting matte finish imparts a sense of calmness.
In this project, the existing exterior panels from the second floor upwards were designed to evoke Nambu tekki, a local ironware handicraft tradition. The building owner was looking for a finish close to that of the existing exterior panels, which is how our Casted Paint came to be selected.
In our Finish Sample Books, Casted Paint is featured as part of our line-up of finishes for steel. However, it can also be applied to other metal materials. For this project, while the interior panels were fabricated in steel, we suggested that the exterior panels be fabricated in aluminium (3mm-thick) to reduce the risk of rust.
Click here to see our finishes line-up including special paints
For the interior, the wall panels installed in the vestibule and the entrance hall were also finished in the same Casted Paint. KIKUKAWA supplied fourteen cut panels, fabricated in 3.2mm-thick steel, ranging in size from 320mm – 1,070mm (W) x 2,530mm (H).
In addition, the 60mm-wide skirting board running along the bottom of the internal panels is finished in HL (hairline) + Coloured Stainless Steel (chemical colouring) in black.
As the designer was looking for very sharply bent corners, all corners were finished by V-cut bending to achieve their design intent.
Renovating your building using metal panels, as seen in this project, can increase the value of your building. If you are considering renovation, please consult with us so we can propose the ideal materials and finishes for your project.
January 18, 2023
KIKUKAWA launched a new metal panel product, ‘Rough Tone Metal’.
This stunning new product realises the texture of cast metal through a range of standardised patterns.
‘Rough Tone Metal‘ panels are lightweight aluminium panels that realise the impactful textures of cast metal. Using our bespoke roll embossing and punching processing, KIKUKAWA has developed a line-up of 9 textures and 6 finishes. Our clients can choose these freely to create a solution ideal for their needs, be that for interior or exterior wall panels, ceiling panels, column panels, or more.
Recent years have seen the price of aluminium and other materials skyrocket, but we anticipate that this product will have strong appeal as a value engineering alternative to cast metal, since the weight of the product is a quarter of that of cast metal, meaning the amount of material used is considerably reduced.
■‘Rough Tone Metal’: Features
●Imparts a sense of impact and substance through the various texture options
●Lightweight aluminum panels just 1/4th of the weight of cast panels
●Unlike cast metal, adaptable to small lot production
●Enables installation lead-time savings
●An exciting line-up of diverse patterns and finishes
■‘Rough Tone Metal’: Overview
●Product name: ‘Rough Tone Metal’
●Price: Please contact our sales team
●Material: Aluminium 2.0mm
●Panel size: W880mm x H1780mm (standard)
*Please consult KIKUKAWA for any sizes larger than standard
●Textures: 9 types
●Finishes: 6 types (see images below)
▼Textures
▼Finishes
Click here to learn more (Japanese link): https://www.kikukawa.com/citytexture/kct06-rough-tone-metal/
December 19, 2022
Listing updated or added content during 2022.
9 December 2022 Project Gallery: Saitama Toyopet, Urawamisono branch
18 November 2022 Project Gallery: SIGMA Head Office
20 October 2022 Project Gallery: Cafeteria at Isuzu Motors
6 October 2022 Project Gallery: Luce Villa Kikukawa
26 September 2022 Project Gallery: TwiNplaza Hachinohe
14 September 2022 Project Gallery: JR Meguro MARC Building
29 August 2022 Project Gallery: VERITAS EIFUKUCHO
4 August 2022 Project Gallery: 2-1,Nishiki-cho Building
22 July 2022 Project Gallery: TENSHODO Building
1 July 2022 Project Gallery: Hommachi Sankei Building
4 March 2022 Project Gallery: AOBA-JAPAN INTERNATIONAL SCHOOL Bunkyo Campus
4 February 2022 Technology: Bright Anodized Aluminium Panels
4 February 2022 Technology: Mirror Finish
August 18, 2022
Lately, many of us are spending more time at home, due to the COVID-19 pandemic. As a result, we have seen an increased tendency for people to be interested in interiors, and have a more refined sense of home aesthetics. This means that a more discerning eye is being turned to the shops and showrooms that sell and showcase interior design products.
Here we introduce the interior fittings of the Sanwa Company’s Tokyo Showroom, located in Minami-Aoyama, Tokyo. Rather than putting individual products, such as kitchen units and wash basins, on display, the company has chosen to exhibit items in mocked-up spaces that showcase how they could work together in a home. KIKUKAWA was commissioned to fabricate and install aluminium trims and bronze column panels for the partition walls.
Bright anodized aluminium was used on the finish of the partition walls. This material is a specialty high-shine aluminium, whose quality is created by applying surface treatment for reflectivity-enhancement prior to anodization. It is characterised by the subtle luminosity of aluminium, creating a soft and gentle effect, distinct from the shine of polished stainless steel.
KIKUKAWA’s Technologies – Bright Anodized Aluminium Panels
The bright anodized aluminum panels were 3mm thick. Since the panel edge would be read as a 3mm profile, we paid particular attention to the cut surface and finish.
Although the partition trims were narrow, at 2700mm (H) by 250-450mm (W), since 25 panels in total were installed throughout the showroom, together they impart a sense of unity and refinement.
As well as pairing seamlessly with the grey floors and walls, the panels work in harmony with the furniture, which is mostly crafted from natural materials.
Situated in the same showroom space are bronze column panels, supplied and installed as cut panel. These were fabricated to fit all four sides of the column, which measured 1000mm (W) by 2900mm (H) by 250mm (D). We used a 2mm-thick bronze, to which a permanent hairline / vibration (PHL) finish and a glossy clear lacquer coating were applied.
Permanent hairline finish (PHL) gives delicate grind marks to the material surface, resulting in diffuse reflection of light which in turn highlights the natural colouring of the material. Applying a PHL finish to bronze material adds a sense of luxury and sophistication to the showroom space.
Click here to see our line-up of finishes: D-PHL + Glossy Clear Lacquer Coating
In addition to the bright anodized aluminium and bronze used in this project, we offer a diverse line-up of finishes that can contribute to achieving high-end interiors (e.g. Minamo panels, Tsuchime (hammertone) finishes, FURUMI (sulfurised) finishes). Please get in touch to discuss your wishes and requirements for finishing materials for internal and interiors projects.
Design: Tetsuo Yamaji Architects
Photography: Kenta Hasegawa
June 29, 2022
In this edition we introduce an example of how decorative metal ceiling panels have been used. We fabricated two types of ceiling panel to feature in the entrance to the ESR Yokohama Sachiura Distribution Center 1, located on the coast of Yokohama City in Kanagawa Prefecture, Japan.
The ceiling panels to the left on entering the facility are Minamo panels®, designed to resemble rippling water. The 1.5mm-thick cut panels, in mirror-polished stainless steel, have been embossed to create irregular patterns across the surface. By gently reflecting the surrounding scenery, these Minato panels® creates a dreamy effect.
Click here to learn more about the Minamo panel® range
Installed over the automatic doors are decorative perforated panels featuring punched quadrilaterals, randomly sized and shaped. The perforations were laser cut from 3mm-thick aluminium cut panels to achieve a cut-out effect. In total, we fabricated 41 panels, sized as standard at 1000mm², each of which had a different randomised pattern.
Lighting installed inside the clipped ceiling, suspended 250mm below the structural ceiling, creates an effect resembling dappled sunlight through trees. The contractor screwed the panels together to achieve seamless joints, then putty filled and painted on site to ensure no joints or screws were visible.
KIKUKAWA is an expert in handling different materials, finishes, and processes. We are happy to discuss projects requiring the use of multiple kinds of metal. As a bespoke metal fabricator, we are experts in high-mix low-volume productions. Please get in touch with us if you are looking for innovative solutions relating to metalwork.
June 17, 2022
KIKUKAWA Succeeds in Discolouration-Free Copper alloy C2600 Laser Welding
A New Welding Method from our Technology Development Team
KIKUKAWA, a bespoke metal architect for interiors and exteriors, has achieved copper alloy C2600 laser welding with minimal heat discolouration.
Discolouration by welding of C2600 copper alloy has been a challenging issue. We have developed a new welding method to resolve this challenge, by adjusting the welding wire composition used at the welded parts joints, as well as the laser welding output. As a result, we are now able to minimise welding discolouration.
We used a colorimeter to compare the colours of the base metal and welded joints using our new welding method. The results showed that the colour difference was ΔE 0.81 (a colour matching degree of 91.6%). This represents a colour difference of less than a third of that arising from conventional TIG welding methods.
■ KIKUKAWA- Development of Welding Technology
At KIKUKAWA, we have a Technology Development Team in place, tasked with looking at how we can use cutting-edge technology such as laser welding in our products. The team spent three years testing and analysing the issue of welding discoloration on copper alloys. They were able to identify changes in copper composition ratios, caused by welding heat, as the cause of discoloration. After examining and testing various potential solutions, the team eventually succeeded in developing a laser welding technique that results in minimal discolouration.
■ Future outlook
This new welding technology enables us to offer our clients feasible fabrication methods where welding is required on finished surfaces. We will continue to focus on responding to client demands through our ongoing technology development. We are committed to exploring all possibilities in metal processing as a world-leading metalwork company.
*Brass: An alloy composed of 60-70% copper and 30-40% zinc. In this instance, we used C2600 as the base material, which is closer to gold in colour.
** ΔE (Delta E): A numerical value indicating the difference between two colours according to the distance between them in colour space. A value of ΔE 0.8—1.6, is said to represent a level where high colour accuracy is achieved and only a very slight difference is perceived with adjacent colours. At KIKUKAWA, we set a high standard with our in-house inspections requiring a value of ΔE 1.0 or less.
May 16, 2022
KIKUKAWA, a bespoke metal architect for interiors and exteriors, has initiated the use of virtual reality (VR)* technology in our engineering work. Following are some examples of how we are using VR technology.
■ How KIKUKAWA uses VR technology
Once drawing data, created using 3D-CAD, is loaded into VR software, it creates a three-dimensional construction image. Engineers then wear VR headsets, which allow them to “see” a three-dimensional image. By operating the controller, the engineers can freely move and magnify the construction image, examine it from all angles and verify how products in the drawings will actually look in three-dimensional space. We introduced the VR software in our design work last year, and so far, we have used the technology in four projects for verification at the design stage.
■ Advantages of VR-Enhanced Design
・Allows to check how a design will actually look once constructed from the eye level, for example how it will look when viewed from below.
・Enables to determine intuitively whether, for areas featuring intricate use of backing frames, stiffeners and panels, it will be possible for workers to gain access and carry out necessary work during installation.
・Reduces the risk of reworking, as it makes it possible to predict potential challenges and problems —which previously could not be discovered until installation.
In the project that was the catalyst for the roll-out of VR technology, the design included an area where multiple metal panels were densely layered in a narrow space (see below). The nature of the design made it challenging to determine, just by looking at the design drawings, whether workers would be able to gain access during construction. As such, we decided to use VR imaging to verify, visually, whether there would be space for hands to fit between the panels. This advanced verification process prevents potential reworking during construction.
■ Background to VR Roll-Out
KIKUKAWA has introduced the VR software as a verification tool for actual construction, in response to our desire to determine in advance whether it is feasible to install what is designed in our drawings.
To generate VR images from the design drawing, it is imperative that we create 3D model. KIKUKAWA has already shown itself to be an industry leader in this area, having already put in place a 3D-capable system, and applying 3D-CAD design in multiple projects. As such, we have been able to enjoy a comparatively smooth roll-out of VR technology.
■ The Future of VR at Kikukawa
Although the application of VR in KIKUKAWA projects remains on a trial basis at present, our intention is to use this technology in more projects going forward. In December 2021, we held in-house training on VR imaging manipulation for all staff in our design department. As our successes using VR technology continue to accumulate, we will also be looking at expanding its use to other departments such as installation, as well as utilising it in client meetings.
*VR: an abbreviation for virtual reality. Also known as a simulated 3-D environment. VR headsets enable the user to view 360˚ images, giving a sense of actually being in that simulated space. VR is currently used in application across a wide range of fields, including gaming, sports, and medicine.
April 14, 2022
KIKUKAWA, a bespoke metal architect for interiors and exteriors, has developed an additional line-up for our Alumiére® range. This latest line-up features new colours and special polishing effects. Sample boards of these new finishes became available on April 1, 2022.
For the initial Alumiére® line-up, we developed a selection of finish options which made the most of aluminium’s inherent luminosity, with each finish offering a different level and texture of shine. With this second drop, we are adding six new finishes to the range, including gold, which has recently become increasingly popular, and polish effects which emit a seemingly three-dimensional lustre.
KIKUKAWA has developed these new finishes using the know-how on luminous aluminium alloys we were able to cultivate during our work on the exterior panels for the Sumida Hokusai Museum in Tokyo. Alumiére® finishes are designed to draw out a variety of additional qualities, including luxuriance, softness, and warmth, to enhance the inherent elegance of aluminium. The finishes are intended to be used to complement a wide range of styles across diverse internal and interior settings.
■Additional Line-up of Alumiére®
① Champagne Gold: A finish with a subtle gloss
② Light Gold: A softly muted golden finish
③ Vivid Gold: A bright golden finish
④ Feather Vibration: A finish with grind marks overlapping like furled feathers
⑤ Scratch Cross HL (Scratch Cross HL): A finish with delicate, diagonally intersecting HL (hairline) grind marks
⑥ Wave HL (Wave HL): A finish with gently curving HL grind marks, inspired by the drape of curtains.
*Please see below for the details of the first release of Alumiére® interior finishes.
■Maximum Workable Sizes for Alumiére®
・Curved panel, 2.0mm thickness: Max. W1150 mm x H4000 mm
・Cut panel, 3.0mm thickness: Max. W1200 mm x H4000 mm
*Alumiére® is a registered trademark of KIKUKAWA.
■Alumiére®: Overview and Features
Each Alumiére® finish is achieved by adding shine and texture to a luminous aluminium alloy base. These finishes make the most of the lightweight feel of aluminium while also drawing out its lustre and brilliance to bring a range of expressions to interior spaces.
◆ A line-up of finishes that draw out the lustre and brilliance of aluminium to create various expressive impressions
◆ Alumiére® finishes boast a brilliant metallic lustre, previously achieved with stainless steel, with lightweight aluminium at just 1/3 of the weight
◆ Clients can create their ideal combinations by freely selecting from the available shine and texture options
■Origin of the Alumiére® Name
KIKUKAWA coined the brand name Alumiére® as a portmanteau of “aluminium” and the French word “lumiére”, meaning “light”. The name is intended to evoke an impression of aluminium reflecting light and shining brilliantly, as well as our hope that we can become one of the lights of hope that illuminate the world.
■ First Sample Line-up
Our first line-up of Alumiére® finishes was prompted by requests from our clients, who wanted to recreate the brilliant metallic shine of stainless steel with aluminium. In response, we prepared sample boards of six finishes, each with its own unique combination of shine and texture.
① High Bright Silver: Our glossiest finish
② Bright Silver: A high-gloss finish
③ High Bright Hammertone: A finish in which the textural irregularities of the hammered finish create shadow and a three-dimensional effect
④ High Bright PHL (Vibration): A sparkling finish achieved with vibration (delicate, randomly placed grind marks).
⑤ High Bright Silky Blast: A bespoke blasting finish exclusive to KIKUKAWA
(※general alumite (anodized) finish)
■Exterior Specifications Line-Up
Our first line-up of Alumiére® finish samples, intended for interior settings, prompted client enquiries about the possibility of using Alumiére® finishes in exterior settings too. In response, we were able to develop an additional line-up of finishes which, with the addition of a composite coating to the first six interior finishes, meet the performance requirements for exterior specifications. These finishes are ideal for use on exterior wall panels, where they will softly reflect the scenery of the surrounding city.
April 5, 2022
As the world faces increasingly serious environmental challenges, including global warming and air pollution, it’s clear that many clients are making choices about building materials based on how those materials can help to reduce their environmental footprint. Here, we introduce some of KIKUKAWA’s leading eco and sustainable metal building materials and paints.
■Sun-shielding louvres
Rather than internally fitted blinds and curtains, louvres installed on the exterior of a building are more effective in shielding sunlight. By shading the building from direct sunlight, they prevent the interior building temperature from rising too high, thereby reducing the need for air conditioning and contributing to CO2 reduction and a lower energy footprint.
Project Gallery: The Faculty of Engineering of the University of Tokyo
■Expanded metal
Expanded metal is formed by stretching out cuts made in metal sheets, meaning there is none of the loss or scrap that arises with punching. The area of the processed material is also greater than that of the original material, which has led in recent years to considerable interest in expanded metal as an eco-friendly material.
KIKUKAWA’s technologies – Expand Metal Louvers
■Powder coatings
Powder coating is a process in which static electricity is used to spray finely ground pigment onto the target surface. The powder is then heat-cured to form a coating. This technique helps to reduce the burden on both the environment and workers in the following ways:
● Mitigates air pollution: does not contain organic solvents, in the form of volatile organic compounds (VOC), which are the cause of photochemical smog
● Reduces loss: has a high adhesion rate in comparison to organic solvents
● Protects the health of workers applying the coating: contains no VOCs, which are the cause of sick building syndrome.
Project Gallery: Arts Maebashi
We recommend powder coatings to finish both punched and expanded metal louvres. With standard paint coatings, it can be difficult for the paint to reach all of the holes in punched panels, or cuts in expanded metal. Powder coating, however, ensures that the paint adheres consistently across all parts, leaving a thick and even coating. In addition, our high weather resistance polyester powder coating is considered equivalent in performance to our fluororesin coating, and is regularly used to finish exterior materials.
Project Gallery: Search by Finishes: Powder Paint Coating
■Materials
During machining, to minimise material loss, we use machining programs to cut out all parts from metal sheets. During manufacturing, we recycle everything we use, from small scrap (metal shavings) to metal building materials which are being removed from a site as they are no longer required.
We have also taken part in a project to upcycle aluminium materials as decoration for commercial spaces. Through this project, aluminium retrieved from 700 series Tokaido Shinkansen cars was reborn as eaves designed to resembled noren (traditional fabric curtains), and installed in Tokyo Gift Palette, a shopping mall inside Tokyo Station. See the link below for more details.
News: Release: Bullet Train Upcycled as Interior Decorations for a Mall, Tokyo Gift Palette
We are also developing a range of other eco building products, including solar LED street lights and solar power generation equipment. Please get in touch if you are interested in choosing eco and sustainable building materials.
February 18, 2022
Our construction portfolio, ‘Isetan Shinjuku – 5F Watch Department, Main Building’, was featured on the December 2021 issue of ‘Stainless Steel World’, a global magazine about stainless steel.
To learn more about this project, click the following link:
Project Gallery: Isetan Shinjuku – 5F Watch Department, Main Building
To learn more about ‘Stainless Steel World’, click the following link:
https://www.stainless-steel-world.net/
January 19, 2022
Expanded metal is sheet metal that has been processed into a mesh-like structure. KIKUKAWA’s expanded metal imparts a strong feeling of solidity, achieved by widening the openings of the mesh. It offers both functionality and style and can be used in a wide variety of settings, from exteriors to ceilings to partitions. Since expanded metal is formed by stretching out cuts made in metal sheets, there is none of the loss or scrap that arises with sheet metal punching, and the area of the processed material is greater than that of the original material. As a result, expanded metal has been gaining increasing attention in recent years as an eco-friendly material.
Below, let us show you some examples of how this versatile architectural material has been used in projects.
■ Exterior Use
In exterior settings, expanded metal panels can act as louvers. Expanded metal offers a number of functions as an environmental building material: while its mesh structure ensures adequate daylight filters through, at the same time it provides ample blockage of sunlight and prevents indoor temperature increases.
Superlative functionality aside, expanded metal is also eye-catching, bringing a striking look to façades. The strand width, in other words the width of the metal strands between each opening, can be adjusted as desired; a wider strand width will result in a façade with imposing solidity, while a narrower strand width will create a softer look, closer to that of a fine mesh. The appearance of expanded metal will also change according to the angle from which it is seen and the time of day.
■ Ceilings
“We want to remove the tiles to expose the full height of the ceiling, but we also don’t really want to show the light fittings and air conditioning units”. KIKUKAWA’s expanded metal ceiling is an ideal solution to this sort of client dilemma, a third ceiling option that incorporates the benefits of both suspended ceilings and open ceilings. Expanded metal provides adequate concealment of ducts and pipes, while the sharp and airy design works to open up the space.
■ Partitions
The characteristics of expanded metal also make it suited to partitions. As a material it boasts great ventilation and permeability, making it possible to ensure both adequate circulation and visibility. This can help to achieve comfortable interior environments. Expanded metal partitions can reduce the sense of oppression present in some spaces while still providing an adequate level of obstruction to lines of sight.
In this way, expanded metal can be used in a variety of settings, and its look can be transformed depending on how this architectural material is processed and adapted.
At KIKUKAWA, we offer a fully made-to-order service that is bespoke to client needs or project requirements. We also offer the semi made-to-order KCT Series, which enables client who are unfamiliar with using metal materials to choose the most suitable option from a range of pre-determined patterns. Please get in touch with us to discuss your needs.
See the links below for more details on expanded metal
Kikukawa’s Technologies – Expanded Metal Louvres
See the links below for examples of projects using Expanded Metals
Project Gallery – GMO hinata office
Project Gallery – PORTAL POINT HARAJUKU
January 6, 2022
In recent years, the construction industry in Japan has seen an increasing use of wooden building materials. While it is true that an interior space designed with only wooden materials will result in a very natural-looking environment, it is possible, through the incorporation of metal finishes, to bring touches of luxury and refinement.
Still, even if a client decides to introduce elements of metal into their interiors, the question remains of how best to match the inherent warmth of wood with metal, a material so often seen as cold, even severe. Here, we introduce a number of metal finishes that can work in harmony with wood-tone interiors by walking you through some previous interior projects featuring a range of metals, including aluminium, steel, and bronze.
This is the Cathay Pacific Lounge at Tokyo Haneda Airport. The entrance wall panel and the reception desk are both finished in what we call FURUMI (meaning “antique”). The FURUMI finish is realized by the marriage of a traditional metal treatment technique and an original method developed by KIKUKAWA.
The look and texture of the end result is dependent on the base materials used and, for example, the weather conditions at the time the finish is applied. This is comparable to the way that no two pieces of wood will have the same pattern of grain running through them. The characteristic tonal effect brings depth and a sense of calm to interior spaces.
The logotype and logomark on the wall panel are finished in polished brass, giving them a golden shine which brings a palpable sense of luxury to the entrance.
The serving counter is also finished in FURUMI. By applying indirect lighting, the reddish tone of the closely illuminated counter gradually fades into black. It has a subtle feel that works perfectly with the walls, styled in teak. Over time, the tonal changes that will arise in the FURUMI finish can be savoured alongside the corresponding changes in the wood featured in this interior space.
Click here to learn more about Bronze Finish Samples – FURUMI (sulfurized) finish
Let us show you another project, namely the library space of Taisho University’s Building 8, which features wall panels fabricated by KIKUKAWA. These panels, comprising double-layered punched steel, are strikingly finished in a metallic gold powder paint coating. The lustre of the punched panels is enhanced by the use of light tones of the oak featured in the shelving, desks, and stair risers.
Next is the Akasaka Intercity AIR project, where we used a specific antique coating on the reception desk. This special-purpose coating, applied to a base material of steel, has a subdued, matte texture, which blends well with the wooden textures seen on the ceilings and walls. The same finish is used on the surrounding metal partitions. Thanks to a combination of the welding expertise of craftspeople and this special-purpose, antique-look coating technique, these design elements have been imbued with a character akin to antique handicrafts.
Click here to learn more about Steel Finish Samples – Antique Bronze Paint
In addition to the special finishes introduced above, KIKUKAWA offers an extensive range of standard finishes which can bring a touch of luxury and style to any wood-tone interior.
The ceiling panels installed in OVOL Nihonbashi Building feature a standard finish, in which an acrylic resin baked coating in black has been applied to a base material of aluminium. We were able to achieve a highly glossy coating, which allowed us to link the ceiling to the shine of the Mahogany-esque flooring material. This brings just the right amount of subtle lustre to impart a sense of luxury and of refinement to this interior space.
KIKUKAWA has a broad line-up of finishes in addition to those mentioned above. We are able to offer a seamless service in metal building materials, incorporating everything from fabrication to installation. Please free feel to contact us to discuss your requirements and ideas for both interior and exterior applications.
For further details on the projects introduced here, please see the following links:
Project Gallery: Cathay Pacific Lounge at Tokyo Haneda Airport
Project Gallery: Taisho University’s Building 8
December 20, 2021
Listing updated or added content during 2021.
22 December 2021 Project Gallery: LUCID SQUARE SHINJYUKU EAST
3 December 2021 Technology: PHL (Vibration) Finish
3 December 2021 Technology: Metal Products Using Coloured Stainless Steel
25 November 2021 Project Gallery: Ginza 6-chome-SQUARE
7 October 2021 Project Gallery: Jewelry Paris
14 September 2021 Project Gallery: GMO hinata office
14 September 2021 Project Gallery: AIGIA Studio
December 15, 2021
KIKUKAWA, a bespoke metal architect for interiors and exteriors, added a new line-up of exterior specifications to its Alumiére range on December 1, 2021. The Alumiére range is designed to add shine and texture to luminous aluminium alloys.
In March 2021, KIKUKAWA developed the Alumiére range of gently luminous finishes for aluminium. Initially, the range was launched with a six-strong line-up of finish options, all of which were intended for interior use. Subsequent to launch, we received many enquiries about the possibility of using Alumiére finishes in exterior settings. With the addition of a composite film, we are now able to offer an additional line-up which meets the performance requirements for exterior specifications. In doing so, we hope to better meet our clients’ needs, such as use on exterior wall panels, which enables the surroundings to be reflected on the gentle and characteristic shine of our Alumiére finish.
Features of Alumiére®
◆A line-up of finishes designed to highlight the inherent luminescence and shine of aluminium and to create a wide range of expressions
◆ Achieves a luminescence equivalent to that previously only possible with materials such as stainless steel on aluminium, which is only around 1/3 of the weight
◆ Options for luminescence and texture (hammertone, vibration, Silky Blast®) can be freely combined
Additional Line-up of Alumiére®
(1) Bright Silver (Composite coating)
External specification with a luminescent finish
(2) High Bright Silver (Composite coating)
External specification with our brightest luminescent finish
Maximum Workable Sizes for Alumiére®
Curved panels with a 2.0mm thickness: Max. 1150mm (W) x 4000mm (H)
Cut panels with a 3.0mm thickness: Max. 1200mm (W) x 4000mm (H)
Project Gallery: Click here to see some projects that used Bright Dip Anodized
Click here to learn more (Japanese link): https://www.kikukawa.com/citytexture/alumiere/
December 2, 2021
KIKUKAWA Kogyo Co., Ltd., a bespoke metal architect for interiors and exteriors, launched a package of measures on October 29, 2021, entitled the KIKUKAWA SDGs. These measures are designed to align with and help to achieve the Sustainable Development Goals (SDGs) established by the United Nations.
KIKUKAWA has long been engaged in measures to reduce our environmental footprint. In response to the growing awareness of society as a whole in recent years, we decided to mobilize the entire company and adopt a more systematic approach. As such, we have developed a framework for the implementation of a package of measures that we are calling the KIKUKAWA SDGs.
Going forward, as well as taking a company-wide approach to working on specific measures, we will work on raising awareness among our employees by displaying posters in our offices and being open about our performance. In doing so, we aim to continue to be a company that is valued as necessary by society.
■ Overview of the KIKUKAWA SDGs
●Recycling waste materials (paper products, wood waste, waste plastic)
・Sorting waste materials by type to promote material recycling (*1)
●Reducing energy consumption
・Using electric tools instead of pneumatic tools (*2)
・Setting air conditioning at appropriate temperatures (cooling at 28℃, heating at 20℃)
●Reducing purchase of raw materials and secondary materials
・Reducing material loss, using standard components
・Simplifying packing to reduce the use of packing materials
●Raising awareness among staff
・Building awareness through poster displays in our offices
・Reporting performance at management meetings
・Holding seminars
*1 Material recycling:
the process of recovering raw materials from product waste in order to reuse them. This kind of recycling is more efficient in reducing environmental footprints than waste-to-energy recycling, in which waste is processed into a fuel source in order to recover its thermal energy.
*2 Pneumatic tools:
Pneumatic tools, or air tools, are driven by compressed air. They are powered by air compressors, which consume high levels of energy, making them less energy efficient than electric tools.
November 30, 2021
An article about KIKUKAWA was posted on the website of “THE WORLD FOLIO”, a global news agency.
Our president talked about Japanese manufacturing, some projects we have been involved in, and our business strategies in the interview.
November 26, 2021
KIKUKAWA is able to transform the visions and designs of our clients into reality by making diverse shapes and forms possible. We achieve this through our high-precision metal processing, which combines cutting-edge technology with highly-skilled craftsmanship. The bronze cube we will introduce below is a perfect embodiment of what we can achieve by bringing these two complementary capabilities together.
KIKUKAWA was invited to exhibit at the Maison et Objet fair in Paris in September 2021. In line with the fair’s theme of “innovative materials”, we used a range of advanced technologies to fashion 1.5mm-thick brass plates into a cube. We used 3D modelling to design our bronze cube, which was formed from 150mm x 150mm panels. Each of the cube’s six sides was indented and then punched with multiple holes. A clear coating was applied to each side to prevent oxidation and amplify the beauty of the base material.
■Cutting-edge technology
The indented shape was created using incremental forming, which is a dieless metalworking process. To punch perfect circles, we used a 3D machining unit capable of handling even indented surfaces to vertically drill 10mm diameter holes.
Next, in order to trim each punched metal sheet into a square (150mm by 150mm), we used a laser cutting device capable of the guided cutting of 3D shapes. Finally, in order to connect the six sides of the cube together, we used fibre laser welding, which achieves small beaded yet deeply penetrating welds with minimal heat-induced discolouration or distortion.
Click here to learn more about Kikukawa’s proprietary Incremental Forming technology
Click here to learn more about Kikukawa’s proprietary Fibre Laser Welding technology
Click here to find out more about Kikukawa’s Machining Brass technology
Click here to find out more about Kikukawa’s Fiber Laser Cutting technology
■Craftsmanship
Highly skilled craftspeople also worked on the cube, for example correcting any distortions arising from machining and finishing the corners after laser welding. This ensures a flawless end product.
We have produced a video documenting how the bronze cube was made. You can watch the video about our bronze cube here.
November 17, 2021
The coating on Phozinc (zinc phosphate) finishes is formed by a natural chemical reaction, resulting in characteristically irregular patterns and shading. In exterior settings, this natural appearance blends seamlessly into the surrounding landscape, while in interior settings it is easily combined with diverse other materials while also working as a highlight that brings cohesion to interior spaces.
Let us introduce a project which made extensive use of Phozinc: the JR Yokohama Tower, completed in 2020. Phozinc and aluminium panels feature in the atrium, the lower commercial zone, and the office zone. These Phozinc panels were made from 2.3mm-thick steel that has been hot-dipped galvanized (immersed in a bath of molten zinc to form a layer of zinc) then phosphated (immersed in a solution to create a layer of microscopic phosphate crystals) to form a strong coating.
The octagonal panels used in the covered carriage way of the office zone impart a sense of grandeur and harmonise well with the warmth of the brick-style wall tiles. Eight Phozinc panels, each around W640mm x H3400mm, are used for each octagonal column. Despite it being difficult to control the shading and patterning of Phozinc when used with longer pieces, our expertise enabled us to rise to the challenge. The skirting board has been fabricated to fit with the gently sloping floor and is also finished in Phozinc.
The atrium, which is open up to the fifth floor, features Phozinc column panels. None of these Phozinc panels have identical patterns and tones, meaning they match well with the irregular texture of both the wood ceiling louvers and the wood grain-effect flooring, to further enhance the natural feel of the space.
KIKUKAWA’s Phozinc finish is available in three shades: light, medium, and dark. For the JR Yokohama Tower project, different shades were used for different features. The darkest shade was chosen for the atrium column panels mentioned above, to give emphasis to the space, while the column panels for the commercial zone are in the lightest shade to create a bright and breezy atmosphere. The appeal of this finish remains the same whatever the shade: a natural texture and superlative quality that simply cannot be achieved with paint.
Finally, let us show you the column and wall panels in the atrium at the entrance to the office zone, which have also been treated with Phozinc. Here, the matte effect of the coating brings a sense of tranquility and sophistication to the space. They work in seamless harmony with the white and silver of the aluminium panels, while the dark shade gives an accent to the space. Notice the column in the left foreground of the image below: at the corner joints, the panels have been bent to fit, giving the impression of greater depth and weight in comparison to cut panels.
In this project, we used steel treated with Phozinc, but similar finishes are available when using the lighter base material of aluminium, such as a special paint designed to resemble Phozinc finish. If you are considering using Phozinc or other special finishes, please consult with us here at KIKUKAWA.
October 4, 2021
KIKUKAWA, a bespoke metal architect for interiors and exteriors, added a new pattern to its Minamo panel® range on September 21, 2021. Minamo panels® are mirror-polished stainless steel panels embossed with beautiful rippling patterns, hence the name Minamo, meaning “Water Ripple”.
KIKUKAWA launched the Minamo panel® range in April 2021 with a line-up of three standard patterns. The range prompted huge interest among customers, thanks to the unique way in which the delicate ripple patterns spread and shimmer across the panels. A number of customers inquired whether the ripple pattern could be made more pronounced, in response to which we have added a new pattern to our standard line-up: P-1 “Seseragi” (meaning “babbling stream”), with more pronounced rippling than our existing patterns.
We are confident that this four-strong line-up will help designers to visualise and make the best choices for their projects. We also expect to see a broadening in the range of designs and projects which feature these beautiful Minamo panels®.
●Material name: Minamo panels® *Registered trademark
●New pattern name: P-1 “Seseragi” (“babbling stream”)
●Material type: SUS304, up to 1.0mm thickness
●Finish: Mirror polished finish (other finishes possible, e.g. HL)
●Panel dimensions: max. W1500㎜x H3000㎜ (larger panels negotiable)
➢Panels can be custom-made, with the size, spacing, and depth of the ripple pattern tailored to requirements
➢In addition to standard size panels, Minamo panels can be adapted for diverse installations and shapes
Click here to download the brochure
Project Gallery: Click here to see some projects that used Minamo Panels (Water Ripple Panels)
July 28, 2021
Of all building materials, metal offers the widest range of design possibilities, since it can be processed most freely and combined with many other materials and finishes. At KIKUKAWA, we will devise the best way to turn ideas into reality by discussing with the designer and recommending the optimal solution to make possible artistic designs hard to achieve with sheet metal. This could mean casting for larger-lot productions or dieless processes such as machining for small lot productions.
To illustrate this, let’s take a look at a metal relief panel installed in an apartment building in Tokyo. The panel is installed directly opposite the communal entrance.
The panel has been produced by machining a 520mm by 520mm, 18mm-thick brass plate, then finishing it in glossy chrome plating.
The design evokes a section of water, onto which drops have fallen, creating multiple overlapping circles of ripples. Together, these four concentric circles create a raised geometric pattern.
The indirect light at the raised parts of the relief causes the transitional effects of the chrome plating’s sparkle to be further enhanced by the light and shade of the surroundings.
As this project was for a one-off piece, KIKUKAWA fabricated the plate using an NC processing machine. We converted the design data received from the designer into processing data, and selected brass as the material to be machined, in consideration of its optimal balance of hardness and softness.
Advances in 3D data mean that the designs we can achieve with metal are constantly evolving and diversifying, to include 3D designs and free-flowing curves. KIKUKAWA understands the increasing needs among our clients to use these designs as accents and highlights in small quantities in their projects.
Just as an extensive variety of designs can be achieved with metal, so too is there a variety of ways to achieve them. Please consult with KIKUKAWA, as we will be able to find the optimal solution for your design, regardless of lot size.
July 27, 2021
Silky Blast Gradation is a new addition to the Silky Blast® series of bead blasting* finishes exclusively from KIKUKAWA, a high-end metal fabrication specialist in interior and exterior building projects. Silky Blast Gradation was added to the series on June 21st 2021.
Silky Blast Gradation is a finish that achieves a beautiful gradation through the careful and gradual adjustment of blast intensity. Gradual changes to the coarseness of the blast medium make it possible to achieve a shifting reflective effect through a soft sheen.
At KIKUKAWA, we understand the increased demand from clients for diverse finishes with subtle sheens and the move away from uniform finishes. We hope that the Silky Blast Gradation finish will expand the range of choices available to designers and, going forward, to have increasing numbers of clients choose this finish for their interior and exterior stainless steel projects.
*Bead blasting: a surface treatment that creates a satin-like texture by propelling blast media onto the surface of sheets or products.
■ Key Features of Silky Blast Gradation
・A delicate gradation that can achieve everything between a mirror-like shine and the soft sheen of frosted glass.
・Achieve luxurious ambience through a metallic finish unique to stainless steel
・Blast gradation creates a feeling of reflections moving across each panel
・As well as achieving gradation across a single panel, we can achieve gradation effects where gradation changes by panel (see below)
■ Overview of Silky Blast Gradation
・Material name: Silky Blast Gradation (Silky Blast® is a registered trademark of KIKUKAWA.)
・Grade / Finish: SUS304, plate thickness min. 0.5mm, Silky Blast finish
・Panel size: Max. W1200mm by H4000mm (Contact us to discuss areas greater than this size)
Click here to download the brochure
Click here to find out more about Bead Blasting (Silky Blast)
Click here to learn more (Japanese link):
https://www.kikukawa.com/citytexture/silky-blast-gradation/
Click here for the press release in PDF (Japanese):
2021.6.29 Kikukawa News Release (silky-blast-gradation)
July 7, 2021
As a building material, metal has a lustre and sharpness that can impart a sense of elegance and urbanity. It is still, however, considered a little cold by some. In reality, the impression given by metal as a building material can change dramatically depending on the chosen material and finish. Here we introduce an example of metal being used to bring warmth to a building, enabling it to blend as seamlessly into nature as a wooden structure.
The Ritz-Carlton, Nikko Resort has a wooden lap siding-style exterior that is actually rendered in metal. Sulfurized copper panels were carefully layered to recreate the appearance of a wood cladded villa.
With KIKUKAWA’s FURUMI (sulfurization) finish, the final colour can be adjusted by fine-tuning the sulfurization treatment, making possible a wide spectrum of shades: from a light hue similar to untreated copper alloy to a rich, almost black tone. For this project, copper panels in three different shades were positioned randomly to evoke a natural texture. The balance of shades and positioning was left to the discretion of KIKUKAWA, so the manufacturing and installation departments worked closely to determine the number of panels to fabricate in each shade as well as the procedure for their installation.
The copper exterior, totalling some 5500m² in area, was created by overlapping copper panels, each with a standard size of H170mm x W1800mm and a thickness of 0.6mm. The lower edge of each panel was bent slightly outwards, giving it a downwards incline of 5 degrees. This was to give a sense of dimension, equivalent to that seen with overlapped wooden panels.
In this project, sulfurization was used to recreate the effect of a wooden lap siding exterior, but other techniques for recreating wood effects also exist, such as wood grain painting. If you are looking for metal building materials that are outstanding in both workability and durability, please talk to us at KIKUKAWA. Whether it be sulfurization or another of the diverse range of materials and finishes we offer, we can develop the optimal solution for your needs.
Project Gallery: Click here to see The Ritz-Carlton, Nikko Resort
June 21, 2021
Perforated metal products from KIKUKAWA combine both functionality and design versatility. They can also work as light-shielding louvers, thereby helping to lower the environmental burden. At KIKUKAWA, by bringing together machinery and highly-skilled craftsmanship, we can deliver perforated panels in a vast range of shapes and designs while always maintaining the highest standards of accuracy and quality.
One approach to using perforation in design is to layer up multiple perforated panels to create new patterns. It can be as simple as taking two perforated panels with identical holes and distance and layering them up inexactly, so that the holes are not aligned: this is enough to create a wide range of effects. It isn’t just the misalignment of the holes or the distance between the panels that creates this variety; different effects will arise according to the angle at which the layered panels are viewed, too.
To illustrate this, let’s take a look at the Shippo (overlapping circles) patterned panels, created through layered perforation, that were installed in Building 8, the general learning support facility, at Taisho University, a Mahayana Buddhist university. For these panels, circle of 100mm in diameter were punched into panels at a distance of 120mm , and then two panels were layered so that each circle was misaligned by a quarter, both vertically and horizontally. This created the Shippo pattern, which has its origins in Buddhism. Another key feature of the installation was that the Shippo pattern was intended to be illuminated and, as such, the way in which the perforations were superimposed onto the lighting was of crucial importance.
Project Gallery: Click here to see Taisho University, Building 8
The exterior layered perforated panels were created as triple-layer panel units, comprising two layers of 1.6mm steel panels (high corrosion resistant coated steel sheets), and a third backing panel. The depth of each unit was 75mm and a 30mm gap was left between the two perforated panels. Each panel had a standard size of W600mm x H2400mm and were finished in a gold polyester powder coating.
The layered perforated panels for the spiral staircase featured built-in handrail stanchions, while the Shippo pattern was achieved by layering two panels, one inner and one outer. A three-dimensional shape for the spiral staircase was then achieved by curving (R bending) the panels. As this demonstrates, KIKUAWA can achieve curved and three-dimensional shapes, with diverse finishes and fits, such as layered perforated panels.
KIKUKAWA’s Technology: click here to find out more about our 3D Processing Technology
With layered perforated panels, shifting the panels even slightly to misalign the perforations makes it possible to deliberately generate the moiré effect (interference patterns). As the light passes through the overlapping patterns, both of the original perforations and from interference, the patterns are highlighted to stunning effect.
There are unlimited possibilities to achieve your ideas and designs through metal perforating techniques. KIKUKAWA is committed to working closely with our clients and realizing their designs and dreams by utilizing KIKUKAWA’s highest standards of technologies and expertise.
KIKUKAWA’s Technology: click here to find out more about our Perforating Technology
May 11, 2021
The advantages of die-casting decorative metal claddings are in their workability and strength. In particular, aluminium is lightweight, accommodates complex shapes, and has good corrosion resistance and strength. Therefore, Kikukawa may recommend the use of casting to craft intricate designs or those with substantial quantity. As metal construction experts, Kikukawa and our associates have the expertise and technology to implement various bespoke high-quality designs.
Pictured is an example of this; die-cast aluminium ceiling panels installed within an office tower in Marunouchi, Tokyo.
The ceiling of the entrance lobby is alternatingly lined with 1200mm wide die-cast aluminium panels, and 250mm wide aluminium slits. The longitudinal side is split at 2600mm pitch, and the panels are installed with 5mm thin joints.
Six rows of wall panels at the back are also lined with die-cast aluminium panels.
The die-cast pattern imitates the bush hammering* finish on stone with vertical lines. The surface is finished with the bespoke black acrylic resin-baked coating. The seemingly random and inconsistent shades of colour resulting from the rough surface are controlled through Kikukawa’s quality control as a whole.
The rise from the ceiling is lined with die-cast panels, patterned with beaded-like surfaces. These panels are also lined with bespoke black acrylic resin-baked coating.
*Bush hammering finish: Bush hammering finish is applied to natural stone with a bush hammer to create a rough, irregular texture that is comparable to a weathered texture.
The same aluminium die-cast panels line the rise from ceiling panels in the elevator hall. The decorative touch of these 1350mm wide, 3000mm long die-cast panels contribute to the creation of a chic space.
The texture of the panels seems random, yet is carefully coordinated to provide a sense of unity within the space. To achieve this balance in design, Kikukawa crafted a mock-up and lined the final products within the factory as they would be installed so that the client can inspect it in full-scale.
In addition to the die-cast panels, Kikukawa has also crafted the 3mm aluminium cut-edge detailed aluminium panels. The elevator hall is lined with two rows of 980mm by 1340mm down ceiling Kikukawa panels with indirect lighting. The shared corridor is equipped with indirect lighting on one side and is lined with 980mm by 2800mm Kikukawa panels. Both of these ceiling panels are black painted, creating a professional and refined space.
Whether die-casted, metal-worked or otherwise, Kikukawa has the expertise and know-how to provide consultations for various decorative metal constructions. Based on the requirements of the project, our experts will consider and propose the most suitable material, metalworking methodology and finish. Please contact our representative for more information.
April 27, 2021
Kikukawa is well known for its metal craftsmanship for various bespoke metal constructions; from panels, interiors, staircases, interiors, and otherwise.
From projects within Japan to those overseas, small-scale or large-scale, our bespoke services are not limited. An example of this is the newly built Tums nursing home in Kawaguchi-city, Saitama prefecture. Kikukawa metal was selected for the bespoke frame works in the first-floor entrance hall.
Fifty-one pieces of 2.4m high, 0.8m to 1m wide fixed steel window frames were installed in the entrance hall. Both finished with black acrylic resin baked coating, the exterior mullions are crafted from 6mm thick, 75mm wide flat bars while the interior mullions are crafted from 75mm wide, 75mm high steel tees to ensure the necessary wind resistance strength and the clean aesthetic required for this space.
One of the continuous windows at the entrance hall is a flush door crafted from 1.6mm steel plate. Allowing access to the terrace, the interior side is filled with rock wool and finished with black acrylic resin baked coat.
Kikukawa has taken on various projects, from those with cutting-edge design to those requiring specific functionality or aesthetic. While these are our most famous works, we have also taken on less complex projects requiring high-quality. Please contact us for your metal construction or sample requirements, as Kikukawa’s experts and craftsmen has the expertise and technology to provide the necessary support required for your project.
April 21, 2021
April 21, 2021 – Kikukawa released the following newsletter in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, fabricated a bespoke aluminium chair entitled ‘Shades of “X”’ in collaboration with designer Toshiki Omatsu*, also known as a lecturer of the prominent Kuwasawa Design School. The chair takes full advantage of Kikukawa’s dual curving technology and the seat can be detached from its mounting. The project was funded by Kuwasawa Design School’s 2020 subsidy for its lecturers.
Click here to find out more about Kikukawa’s dual curving technology
Click here for the newsletter in PDF (Japanese):
2021.04.21 Kikukawa News Release (Shades of X)
April 14, 2021
Metals are versatile – depending on the material or finish, applicable metalwork and quality control methodologies differ. Being architectural metal construction experts, Kikukawa has the know-how and experience to understand the project requirements and apply the best-suited finish, metalwork, or solution. Whether this is within one project or across many, we will provide the necessary support, services, or consultations necessary from design to installation for the project’s metal construction requirements.
Pictured is a cultural facility that opened in Takasaki-city, Gunma prefecture in 2019. Kikukawa metals were selected for the exterior dark zinc phosphate coated steel panels and the interior black coloured stainless steel panels. While both are black metals, the zinc phosphate coat exudes a naturalistic tone while the coloured stainless steel maximizes the metallic texture of the material.
Both finishes require specific expertise in quality control. Hot-dip galvanized and zinc phosphate coating requires any metalworks to be conducted post finishing. Therefore, thermal distortions from the finishing process need to be considered. Coloured stainless steel panels also require metalworks to be conducted post finishing which limits the metalworks, such as welding, that can be applied. Kikukawa also provides high-quality colour control for both panels by managing the material lot.
Exterior panels are crafted from 3.2mm thick steel, with cut-edge details. Typical size being 1m by 3m, the panels are imposing.
Click here to find out more about zinc phosphate coating
Interior panels within areas such as the elevator halls are lined with mirror-based PHL (vibration) finished black coloured stainless steel. Crafted from 1.5mm thick stainless steel, the bent-edge detailed panels are smooth and flat, as can be observed from its highly reflective surface. The high reflective metallic surface with the 5mm thin joint details contribute to the creation of a sophisticated space.
Regardless of the material or finish, Kikukawa is able to provide consultations for various decorative metals and metal claddings. Please contact our representative for complex projects, feasibility or available finishes.
March 31, 2021
March 31, 2021 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, launched an expansion to the Water Ripple Panel series. The variation stems from the frequency and depth of the ripple pattern.
Click here for the press release in PDF (Japanese):
2021.03.31 Kikukawa News Release (Water Ripple Panel Series Expansion)
Project Gallery: Click here to see some projects that used Minamo Panels (Water Ripple Panels)
March 27, 2021
Changing times require a change in the work environment, which are often accompanied by office renovation or renewal requirements. Kikukawa, being an expert bespoke metalcraft and metal construction company, is able to provide various services for office renovation projects, regardless of its size.
Interestingly, our abilities can be observed from our Satellite Office that opened in November 2020, which was renewed from a parking space. The new space incorporates Kikukawa’s metal products to embody the concept, acceleration of communication and innovation, and showcase Kikukawa’s metal crafting abilities.
The exterior is glass-walled, with perforated stainless steel covering the sides that face the road. The perforated panels capture the essence of the exterior from the rest of the office; the curved expanded metal.
The exterior consists of 16 panels of 1.0mm thick BA finished stainless steel with 2mm diameter perforation at 4mm pitch. By curving the perforated panels, the exterior evokes a curtain.
Not only do these perforated panels provide an environmentally comfortable space, but it is also functional. It acts as a shield from the sun and depending on the lighting condition, it acts as window blinds while allowing visibility from the inside.
*These perforated stainless steel panels are available as bespoke or semi-bespoke architectural products. Please contact us for more information.
Kikukawa’s products are used within the Satellite Office as well. The ceiling is equipped with Kikukawa’s ‘R Air-con’, a radiant HVAC system. This is the first installment of the black-coloured ‘R Air-con’, providing a stylish and comfortable space.
Another featured Kikukawa products are the zinc phosphate coated table legs. To promote a more flexible workstyle and to encourage communication, the tables are higher than those typically available. The zinc phosphate coated legs, fabricated from 2.3mm thick steel sheets, add a decorative accent to the simple tone of the office interior.
Having been established in 1933 as experts in metal construction, Kikukawa has the expertise and know-how to provide solutions for metal products requiring high standards, or both design and functionality. Our multi-skilled teams will respond flexibly to complications that are common with reconstruction projects.
Kikukawa’s Tokyo Headquarters serves as a ‘metalwork museum’ to showcase Kikukawa’s metalworking abilities and products, and is open to visitation. Other products, such as expanded metal facade or thin joint stainless steel wall claddings can also be viewed. Please contact a representative or from the inquiry form to take a tour or to arrange for visitation.
March 17, 2021
March 17, 2021 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has developed and released a new line of aluminium finishes which are now available as a sample book, ‘Alumiere’.
For more information on the aluminium finish sample book:
https://www.kikukawa.com/en/materials-and-brochures/
Click here for the press release in PDF (Japanese):
2021.03.17 Kikukawa News Release – Alumiere
March 9, 2021
March 9, 2021 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, launched an expansion to the first product of Kikukawa City Texture (KCT) series, a line of semi-bespoke metal architectural products. The very first KCT series, KCT01 Expanded Metal, is now available as a ceiling.
Click here to view the expanded metal finish sample (bottom of the page):
Kikukawa’s Finish Samples -Aluminium
Click here for the press release in PDF (Japanese):
2019.2.27 Kikukawa News Release (KCT01 Expanded Metal Ceiling)
March 9, 2021
Typically, walls or ceiling panels consist of flat panels. The consistency of the panels is a beauty in itself, however, a more three-dimensional panel may be suitable for a space requiring creativity or uniqueness. Metals, being highly workable and high in strength, have the ability to offer the required design and functionality, such as lighting fixtures or air-conditioning.
Pictured are folded panels installed in an underground square adjacent to the subway. The aluminium cut-edge detailed panels are convex folded into a L shaped pyramid, that stretches from the wall to the ceiling. The folded ceiling panels are 5.8m long, while the folded wall panels are 2m long, crafted from 3.0mm thick cut-edge panel. The resulting isosceles pyramid is maximum 750mm in width, and 240mm in height.
Behind the folded panels are a slit for intake opening; each folded panel acting as a duct. According to the architects, the wider the duct, the more air intake there is. Given this functionality, the design required delicate details to be attended from design, fabrication to installation.
For certain areas without an intake slit, the panels are folded concavely into a diamond. The connecting concavely folded panels to this diamond are uniquely shaped.
These panels are finished with a white fluororesin baked coating. The colour, shape and the details of the panels were inspected based on a mock-up pictured above.
These panels required functionality before design. However, a space coloured with folded panels at a 1.2m pitch are unique. Whether the implementation of the design is the priority, or the functionality, Kikukawa is able to provide solutions and consultation that balances both, or that fulfills the requirements of the project. Please do not hesitate to contact our specialists or experts for feasibility in design or fabrication, or simply for a quotation.
February 24, 2021
Three-dimensionality is important in architecture, especially for facades and interiors as it could become the symbolic piece within a space. As metals are one of the most flexible materials in the feasibility of designs, it is often considered to implement various shapes, designs, or ideas.
One such example is the twisted louvres – an application of the twisting technology. By twisting flat bars, these louvres produce a shop curtain-like gentle facade.
Pictured twisted louvres were selected as the facade of a restaurant. The installed louvres are 2425mm in height, using 109 pieces of stainless steel 6mm by 75mm flat bars totalling up to 11.3m in length. By adjusting the placement of the twist, seven patterns of louvres were used to create the curtain-like change.
Twisting the flat bars require a specialized equipment and know-how. Our experienced craftsmen designed a jig to ensure the high quality and precision required.
These twisted louvres are finished with hairline, and bronze coloured clear coating. The coloured claer coating was also finished within Kikukawa’s factory for quality. The coloured clear coating contribute to a metallic yet warm texture that was required for the space.
As shown, Kikukawa is able to provide various solutions from design to installation to implement creative designs or ideas. We have the expertise and various facilities to ensure the high quality, consistency, and precision required for high-end or complex projects. Contact us if you have sketches or drawings that seem complex, or require consultation for feasibility.
Click here to find out more about Kikukawa’s twisting technology
February 9, 2021
Metal can be used in various places for a variety of purposes: to create a luxurious space, to implement a symbolic design, to symbolize the stately nature of an area. This stems from one of the unique features of metal, its flexibility – in design, finishes and shapes.
Metals typically don a glossy or highly reflective surface, however, it could also be worked into a more dignified physique, like the FURUMI (sulfurized) finish. Introduced below is such an example, three types of FURUMI (sulfurized) finished brass doors installed to an automatic door supplier.
The first type is a single pull automatic door for a mechanical parking lot. To accommodate various cars, the doors are outsized, being 5m wide and 2m tall. To implement this, five pieces of 1.5mm thick brass bent-panel detailed panels, finished with hairline, FURUMI (sulfurized) finish, and clear coating were installed at 1m wide pitch.
The same FURUMI (sulfurized) finished brass was selected for the automatic draw doors of 1130mm wide, 2150mm high at the back door.
The front door of the tenant’s office was also installed with Kikukawa’s FURUMI (sulfurized) finish brass doors. The exterior of the 1680mm wide, 2180mm high double doors are lined with 8 pieces of 1.5mm thick bent-edge detailed FURUMI (sulfurized) finished brass. The three vertical 15mm deep slits create a solid expression.
The slit details also conceal the installation hook detail. As the joint clearance for installation was 0.25mm, the installation required precision. To assist a successful installation for the installation supplier, Kikukawa provided detailed installation detail drawings.
As demonstrated with this project, Kikukawa is able to provide attentive, detailed, and bespoke services for each requirement. For bespoke metal doors or fittings, please consult us for any complications, difficulty, or feasibility.
Click here for more information on FURUMI (sulfurized) finish
February 3, 2021
February 3, 2021 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, launched the fourth Kikukawa City Texture (KCT) series, a line of semi-bespoke metal architectural products. Added to the series are perforated and corrugated stainless steel panels, Punching Wave.
Click here to learn more (Japanese link):
https://www.citytexture.com/kenzai-pro/punching-wave/
Click here for the press release in PDF (Japanese):
2021.02.3 Kikukawa News Release – KCT04, Punching Wave (Perforated Corrugated Panel)
January 26, 2021
Kikukawa is most known for its ability to apply high-standard and complex metalworking from design to implementation. However, our expertise extends to applications of bespoke finishes in addition to the shaping or dual curving of the product.
An example of this is the bronze Tsuchime (hammertone) lampshade installed within a shop in Yokohama. The nine copper lampshades are the central piece to this space, delivering warm gentle light to the room.
In this space, there are seven φ540mm by 490mm high bronze hoods, and two φ540mm by 590mm high bronze hoods, fabricated and installed by Kikukawa.
The design intent was to create ‘warm antique textures with bronze Tsuchime (hammertone) patterning’. Through various sample finishes, the intent materialized into the current glossy clear coated Tsuchime (hammertone) finish, TM-2*.
*Click here to check out TM-2, one of our standard Tsuchime pattern finishes
On a 1.5mm copper sheet, Tsuchime (hammertone) was patterned using Kikukawa’s proprietary technology, then R curved into a pipe then welded to create the cylinder. As any metalworking process after the patterning process interferes with the pattern, Kikukawa’s expertise and craftsmanship were required to pattern and weld the piece into the high-standard product required.
This was made possible by obtaining different approved samples for the welding quality, colour of the product, and patterning, each implemented under Kikukawa’s strict quality control. While the timeline for fabrication was limited, these measures resulted in a high evaluation from our client.
Given the current social situation, this project started and concluded without any face-to-face meeting with the client. Based on e-mail, online meetings or phone-calls, Kikukawa’s experts are able to consult and provide a high standard product from design to installation.
From complex projects to bespoke finishes or feasibility, please consult Kikukawa’s representative to implement your design intent.
Click here to learn more about Kikukawa’s proprietary Tsuchime (hammertone) technology
Click here to learn more about another project with Tsuchime (hammertone) pattern
January 12, 2021
While blasting is typically known as a preparatory treatment, it is actually available as a high-quality surface finish at Kikukawa as ‘Silky Blast’.
‘Silky Blast’ is a series of bespoke blasting finish made available with Kikukawa’s technology and craftsmanship. It is favoured for its luxurious silk-like matte texture and its ability to fully utilize the metallic texture of the material. A selection of this finish is available on our ‘Stainless Steel Finish Sample’ Book, however, since this is a bespoke finish, the coarseness and reflectivity of the finish can be adjusted as needed.
An application of ‘Silky Blast’ is the blasting of a gradient pattern, ranging from a mirror-finish to the silk-like texture within one panel. Pictured below are ‘Silky Blast’ gradient patterned panels installed at the entrance of the KOSE Corporation headquarters in Nihonbashi, Tokyo.
Upon renewal, the entrance was lined with Kikukawa’s 9.6m wide, 2.9m high panels at the back, and 7.3m wide, 1.1m high panels for the counter. Each and every stainless steel panel is finished with gradient patterned Silky Blast finish, ranging from the mirror finish to the matte texture. By carefully adjusting the density of the blasting medium, only the panel surfaces close to the ceiling and to the ground reflect its surroundings.
These gradient-pattern blasted 3mm stainless steel cut-edge panels are installed with a 4mm thin joint. One of the largest panels was 3200mm wide and 950mm high installed on the independent wall behind the counter.
At the corner of the counter is a minimally R bent panel, made available by precise craftsmanship. The top panel of the counter was carefully crafted and precisely installed to ensure a sharp physique.
‘Silky Blast’ requires careful quality control – colour variation could occur by using a different lot of the material. Blasting a gradient pattern complicates the level of QC control. To offer consistent, high-quality panels, our team of metalwork experts conducted high-standard quality control that concluded with a factory inspection that lined all the panels.
The panels lining the independent wall facing the corridor are lined with mirror-polished stainless steel. Each 2900mm high and 920mm wide, the edge panels are crafted with R100mm corners.
The KOSE sign was crafted by cutting out Silky Blasted stainless steel panels. Although Kikukawa is most known for its high-standard metalwork, these letters were provided with the LED lighting systems or acrylic behind the stainless steel cut-outs due to our ability to provide comprehensive solutions.
Upon completion of this project, Kikukawa’s construction was highly evaluated as setting a new standard for metal craftsmanship. Kikukawa provides the most suitable solution given the projects’ requirements including but not limited to design, timeline, cost, and quality standards. Please do not hesitate to consult us on complicated projects or on metalwork or finishing feasibilities.
Click here to learn more about Kikukawa’s bead blasting (Silky Blast)
December 22, 2020
Kikukawa provides expertise and experienced workmanship for architectural metals and engineering, including renovation projects that require high value, quality of work, and efficiency. From the early stages of our involvement, Kikukawa was highly engaged to provide comprehensive and precise solutions from design to installation.
Pictured is ‘Nissei Comprehensive Training Facility’ in Urayasu, Chiba, originally completed in 1989, undergoing a large-scale renovation project from 2019 to 2020. Kikukawa provided the metal construction services and metal panels below the toplight of the ground lobby with 15m high ceiling, a central feature of the facility. Kikukawa’s work covered the beam covers adjacent to the flat panels at both ends and the central curved panels.
The typical beam cover panels are 2280mm in width and 2830mm in height, covering a total of 78m constituted from two 38m rows. Allocated at every 4m, the beam panels are dynamic with 6m perimeters. The panels facing the flat side of the top panels are slanted, while panels adjacent to the curved area are stepped.
Panels adjacent to the curved toplight and stepped panels were installed with lighting fixtures. Being a renovation project, prior onsite measurements and collaborations were necessary to ensure precise cut-outs for panels adjacent to stone and so that the existing systems such as the maintenance ladder rails remained intact.
While renovation project often comes with unique challenges, Kikukawa provides high-standard metal construction services by collaboration with the client, designers, general contractors, and other fabricators.
This renovation project was designed to maintain the bright scenery of the area and adding a touch of sophistication at night. Metals’ high workability is well-suited to the various needs of renovation projects, and the variety of finishes available expand the possibilities of design. Please do not hesitate to contact us for feasibility or consultation on complex projects.
December 20, 2020
Listing updated or added content during 2020.
11 December 2020 Project Gallery: MUNI KYOTO
20 November 2020 Project Gallery: Tokyo International Airport (Haneda) Terminal 2, International Flight Facilities
18 November 2020 Project Gallery: RAYARD MIYASHITA PARK
16 November 2020 Project Gallery: DECKS Tokyo Beach, Seaside Terrace
23 October 2020 Project Gallery: Isetan Shinjuku – 5F Watch Department, Main Building
16 September 2020 Project Gallery: Artizon Museum
15 September 2020 Project Gallery: Katsu Kaishu Memorial Museum
15 September 2020 Project Gallery: KT Zepp Yokohama
24 August 2020 Project Gallery: Wonder Museum, Okinawa Zoo & Museum
9 July 2020 Project Gallery: Iwatsuki Fire Station, Saitama
3 July 2020 Project Gallery: Shimadzu Healthcare R&D Center, W10 Building
9 June 2020 Project Gallery: Tokyo Aquatics Centre
28 May 2020 Project Gallery: The Okura Tokyo
15 May 2020 Project Gallery: Takanawa Gateway Station
27 April 2020 Project Gallery: Shiseido Nasu Factory
16 April 2020 Project Gallery: COREDO Muromachi Terrace
27 Mar. 2020 Project Gallery: Mitsui Garden Hotel Ginza-gochome
December 8, 2020
Kikukawa develops and provides the necessary metalwork by combining cutting-edge technology and its expertise.
Pictured below is a facade renovation project of a high-end brand shop in Shinsaibashi, Osaka. Kikukawa is involved in the sign-frames and screening panels.
In particular, Kikukawa’s craftsmanship is fully showcased in the 3D geometric screening panels of 2090mm width and 430mm height. The cut-edge profile 3mm thick aluminium panels are finished with black fluororesin baked coating. The rectangular pyramid-shaped panels disperse light, reminiscent of precious stones, creating a high-end sophisticated facade.
To implement the client’s requirement – the pyramid panels – under the project’s tight timeline and high standards, Kikukawa’s team selected the use of bespoke bending for this construction. Typically panels of this geometry would be fabricated by welding, as bending would require complex metalwork. However, by selecting bending, Kikukawa’s team was able to provide higher quality panels without welding beams, in a more timely and cost-efficient manner.
Kikukawa’s other works include the 160mm wide cover panels frames and lighting fixture frames, each crafted from 5mm thick aluminium and finished with black fluororesin baked coating. To elevate the design, resin studs are placed in 200mm pitch.
Being a renovation project, the construction required implementation under limited lead time and flexibility in installation. In partnership with other suppliers and the client, Kikukawa was able to contribute to a smooth implementation of the product and receive an outstanding review from our client for our efforts.
Please consult Kikukawa’s team of experts if you have a difficult project, complex design, or seemingly infeasible designs. From facades to renovations to large-scale architectural projects, Kikukawa’s bespoke metal construction experts will provide the most suitable consultations and solutions for each project.
December 3, 2020
December 3rd, 2020 – Kikukawa released the following newsletter in Japanese.
-Summary of the newsletter-
Kikukawa, a bespoke architectural metalworker announced its involvement with the upcycling of 700 series Shinkansen (bullet trains) to building materials for Tokyo Gift Palette, a shopping mall that opened in August at Tokyo Station’s Yaesu North Gate. This upcycling attempt is the first in the history of recycling Shinkansen cars, given its difficulty to separate the material from other layers such as paint or sound insulation materials.
Click here for the newsletter / press release in PDF (Japanese):
2020.12.3 Kikukawa Newsletter (Bullet Train to Column Covers)
November 25, 2020
November 25, 2020 – Kikukawa released the following newsletter release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, announced that it has released a virtual video that allows viewers to take a peek into our factory in Chiba. The video includes interviews of our craftsmen in Japanese.
November 24, 2020
Paint coating is not the only methodology to colour metal. Especially for projects requiring metallic textures, chemical colouring may be a more suitable option. Listed below are a selection of chemically finished stainless steel and aluminium.
Firstly, let’s start with aluminium. Anodization is one of the main methodologies used to chemically finish aluminium: it is achieved by passing a current through an electrolytic solution, with the solution immersed aluminium serving as the anode. Anodizing increases resistance to corrosion and wear, thus is as frequently used as paint coatings.
Click here for more information on anodization
■Electrolytic Colouring
Anodized aluminium may be electrolytically colour coated by immersing the anodized aluminium in metal salt containing solution, and passing a current. The resulting colour depends on the dissolved metallic salts, which are typically tin or nickel. Available colours range from silver, champagne gold, bronze and black.
■Dyeing & Sealing
The microscopic pores of anodized aluminium are deposited with dyeing solutions, then applied with sealing or electrodeposited clear coating. A wide range of colours are available through this process, including red, blue, black and gold. For exterior use, only gold meets the resistance requirements, however other colours are available for interior use.
Secondly, let us visit the colouring methodologies for stainless steel. Typically known as coloured stainless steel, two methodologies are introduced below.
■Chemical Colouring
By immersing stainless steel in a chemical solution, a thin transparent film of chromium oxide is created which improves resistance and creates a distinctive coloured effects due to interference with light rays. By changing the thickness of this film by a few atoms, colours from bronze, blue, gold and black are achievable.
■Sputtering
Sputtering is the process of placing the stainless steel in a vacuum, which is set with a target material that becomes bombarded with energetic ions, causing the target material to erode particle by particle to form a thin new layer on the stainless steel. The target material may vary from titanium or ceramics, each material resulting in various colours from gold, black, bronze, blue or bordeaux.
Kikukawa has established the expertise and partnerships with other finish providers to consult and provide the most suitable finish for the project requirements or design.
In addition to these selected finish, other shades of colours or samples are available upon request. Please do not hesitate to contact us on architectural metal finishes from feasibility to availability.
Click here for more information on aluminium finishes
Click here for more information on stainless steel finishes
November 17, 2020
November 17, 2020 – Kikukawa released the following newsletter release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, announced that it has released a video on FSW, friction-stir welding. FSW is one of the cutting-edge metal crafting technologies that enhance Kikukawa’s abilities to craft oversized architectural metal claddings by welding metals with minimal weld marks.
November 10, 2020
Scraped or etched patterns may be applied to aluminium, stainless steel, and bronze as a way to implement the design intent. Also called the polished or grinded finish, typical finishes include HL, PHL (vibration), and mirror-polished textures. Kikukawa’s metalworking technologies and abilities allow tremendous customization potential for metal surfaces. Pictured below is such an example, the bespoke polka-dot etched finish.
The polka-dot etched finish* is achieved by applying random circular etching to various directions. The size of the pattern, frequency, etching direction, and etching depth can be selected as required.
Pictured is the remodeled Men’s Building of Shinjuku Isetan that opened in March 2019. Kikukawa’s aluminium panels were installed on the 4th floor when the building underwent the first large-scale remodeling in 15 years.
As a department store, the concept of the remodeling was a floor that makes comparative shopping more available. Thus, the new floor layout removed walls between luxury brands – and it divided each space with walls with the names of each brand. This meant that the 15 walls that defined each space were required to create a sophisticated luxurious space that suits the apparel stores within the floor. Kikukawa’s bespoke polka-dot etched finish panels fully contributed to the implementation of this design.
The column panels are fabricated from 5mm vibration (PHL) aluminium sheets, etched with polka-dot patterns as designed then clear coated. Each face is typically 1200mm (W) by 2750mm (H), and the 5mm edges with 2mm thin joints details create a sharp aesthetic.
Kikukawa’s expertise and know-how were fully utilized to faithfully implement the polka-dot patterns of the designer’s sketches. In addition to the QC system, each pattern was carefully placed by our craftsmen.
Polished, grinded, scraped, or etched – Kikukawa is able to provide bespoke or custom patterns as required. From traditional to cutting-edge technologies, Kikukawa selects the most suitable fabrication methodology to achieve the design intent. Please consult us for feasibility or for more information.
November 10, 2020
Nov 10, 2020 – Kikukawa released the following press release in Japanese.
-Summary of the news release-
Kikukawa, a bespoke architectural metalworker announced that its expansion project for the Tokyo Office is complete. The new area built on the first floor is named the Satellite Office.
Click here for the press release in PDF (Japanese)
October 13, 2020
Kikukawa provides a line of semi-bespoke architectural metal materials, known as KCT (Kikukawa City Textures) as part of its effort to improve efficiency for our clients. KCT is a compilation of our expertise and know-how, where selected materials are standardized in dimensions or fixing details to realize shorter lead-time.
The first KCT series, KCT 01, was expanded metal – a mesh-like sheet metal that balances visibility and privacy. Kikukawa’s KCT line has wider strands than typical expanded metals, resulting in an aesthetic that balances design and functionality. KCT01 is available in 4 different patterns.
Introduced below is a project that fully utilizes this material as a facade, Granduo Wakabayashi V. The north facade of the four-story-high newly built apartment is wrapped in Kikukawa’s expanded metal, KCT01: Expanded Metal.
The client sought Kikukawa to implement their design with expanded metal. The final selection of the material was made once the designer visited Kikukawa’s Tokyo office as an example of a building with expanded metal facade.
The details of the facade are 3.0mm aluminium with mesh-pitch 76mm and 17mm strands (CKTEX-D76), finished with silver anodization and matte clear coating. Roughly 80 sheets of expanded metal, with standard dimensions of 760mm in width and 1440mm in height, are used.
The top tier of the facade is cut diagonally, with appropriate fixing details to match the shape of the building. KCT’s standardized fixing details are designed to allow certain levels of flexibility in installation on-site.
The expanded metal facade acts as a screen to provide privacy for the inhabitants, as well as visibility and natural lighting. As the project requirements are perfectly met by the benefits of expanded metals, this facade takes full advantage of the material’s functionality. Kikukawa’s wide strand expanded metals also provide a unique aesthetic, as well as depth that results in a texture that changes throughout the day.
KCT01: Expanded Metal is available as panels with standard dimensions and unique fixing systems. Our services are available for small lot requirements as well as in bespoke requirements. Please do not hesitate to contact us for availability and feasibility.
Click here for more information on expanded metal louvres
Click here for more information on Kikukawa’s Tokyo Office (expanded metal facade)
October 13, 2020
October 7, 2020 – Kikukawa released the following newsletter release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, announced that it has installed a new bending machine to improve efficiency and further digitize its machining process.
October 1, 2020
October 1, 2020 – Kikukawa released the following newsletter release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, announced that it has released a webpage that showcases samples shown in its’ showroom, Studio K+, that opened in April 2019.
September 23, 2020
Implementation of bespoke metal constructions requires special considerations in metal sheet procurement, especially for projects with high standards in quality.
As a bespoke metalworker and metal construction expert, Kikukawa has established partnerships with metal sheet providers to procure bespoke sheets to implement bespoke metal textures or product sizes. We also have the expertise to metalwork these sheets, allowing us to provide a comprehensive solution to the project requirement.
As an example, take bronze- a unique metal that varies in colour depending on its composition. Thus, bronze provides a wide range of options from textures that fully utilize the metallic yet warm and sophisticated tones, to those that combine polishing patterns.
The photo above is a display of a selection of bronze alloys, showing its diversity in the shades of colours from pink to yellow. As the range varies greatly, some consider these alloys as being superficially unique materials.
*Please note that bronze sheets (Cu 90%, Zn 10%) and brass sheets (Cu 60%, Zn30%) are not readily market available within Japan. Thus, these materials require considerations in minimum lot requirements and procurement lead-time.
The following pictures show bronze products that utilized bespoke brass sheets (Cu70%, Zn30%). This bespoke sheet was selected instead of the typical brass (Cu 60%, Zn 40%) for its stronger gold shade. The additional vibration (PHL or VIB) finish enhances this gold shade.
Kikukawa is able to respond to a wide range of requirements in sizes and products types, including panels or fittings that exceed 4m.
These texture samples are available within Kikukawa’s showroom, Studio K+. From the selection of the material to the finish, please do not hesitate to contact us for availability and feasibility. For visitations, please contact us from the inquiry form below.
September 8, 2020
Textures of metal are one of the defining elements within buildings or spaces. Various design intent can be implemented by selecting the most suitable material and finishes.
The following pictures are an excerpt from Kikukawa’s finish samples displayed in Kikukawa’s showroom, Studio K+. Within Studio K+, various selected samples, from the typical finishes to the extraordinary finishes, are on display to showcase the diversity of metal textures, and as an inspiration board for designers.
Common finishes, such as hairline (HL) or vibration (PHL or VIB), can be made-to-order by differentiating various factors such as depth or frequency. These slight changes create an impression when used as a large architectural panel, through elements such as the reflectivity of the panels.
In addition to these material finishes, metal can be texturized by adding processes such as hammertone (Tsuchime). A bespoke pattern can be designed by changing the size of the pattern or its frequency and is sought after for interior projects. These hammering textures can be applied in addition to the hairline (HL) or vibration (PHL or VIB) as required.
Other textures are implemented by designed polishing or grinding patterns. Pictured below is such an example. To the left is Kishage, a series of circular hairline (HL) finishes applied randomly, and to the right is Feather, a series of polishing marks applied diagonally. These and other original Kikukawa finishes are being explored and developed to understand and expand the design possibilities of metal.
Each of these textures shown can be furthered by applying a coat of sulfurization (FURUMI).
Click here for more information on Kikukawa’s sulfurization
Kikukawa is able to respond to various design requests, including the development of new design patterns as required. Therefore, please consult us on the availability of textures, feasibility or design assistance.
*Please note that the impression of these pictures may differ from the actual sample. Therefore, please confirm the finish with an actual sample prior to the final selection.
Click here for more information on Kikukawa’s bronze sample finishes
Click here to contact us for more information on Kikukawa’s showroom, Studio K+
August 25, 2020
Modern pilotis* (also known as piloti or piers) are formed with columns or eaves that are covered in various architectural materials including metal. While stainless steel, bronze or steel may be selected, aluminium claddings are often selected for its lightweight and versatility in finishes.
Kikukawa is able to accommodate various designs in various metals, and have the expertise to implement bespoke requirements in high standards, from design assistance to installation.
An example of such a case is ‘Otemachi One Tower’, completed in February 2020 as part of a large-scale integrated development named ‘Otemachi One’ within the Otemachi district.
Kikukawa’s high-standard large aluminium panels of the vestibule eaves contribute to the creation of pilotis designed to produce an open space. Thus, quality controlling the flatness and the alignment of the joints were key to implementing the design intent.
Roughly 1300㎡ of pilotis eaves were fabricated from 2.5mm thick aluminium bent-edge detail panels, of standard size 1300mm by 3600mm. Finished with a grey shade of fluororesin baked coating, with joints 15mm wide and 50mm thick for refined detail.
The vestibule square columns are lined with 3.0mm thick aluminium panels with cut-edge detail that are 1700mm wide and 10m high. Six 860mm wide, 3500mm high panels finished with black fluororesin baked coating constitute one side of the column.
During a factory inspection, the panels were lifted to confirm the quality. Two panels were aligned to inspect the quality standard of the joint. Similar inspections were conducted for the column panels.
In addition to the vestibule area, Kikukawa provided the column covers in the entrance lobby of ‘Otemachi One Tower’. The 14 columns are 1.4m wide and 10m high, lined with 3.0mm thick cut-edge detail panels finished with black acrylic resin baked coating. Each side of the column is constituted by three 1400mm wide and 3200mm high panels.
Kikukawa’s large-scale and high-standard panels contribute to the implementation of a refined and sophisticated space. Our panels can be seen in other areas of this project, including the Mitsui & CO. Building.
As shown, Kikukawa delivers necessary assistance and product in bespoke metal constructions. Please contact our consultant for more information, feasibility or design assistance.
July 28, 2020
July 28, 2020 – Kikukawa released the following newsletter release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, announced that it has released a video on one of its metal crafting technology, 8-meter bending machine. This video is only available in Japanese, however, it shows the machine in action and Kikukawa’s craftsmanship in ensuring the quality and precision in bending.
July 21, 2020
Bronze alloys have long been used as architectural materials, especially bronze composed of 90% copper and 10% zinc (specified in Japan as JIS-C2200). The colours of these bronze alloys are easily affected by welding heat, known as heat tints, appearing red surrounding the welding bead creating a cosmetic imperfection.
In response to this, Kikukawa has developed a new methodology to weld bronze alloys of 90% copper and 10% zinc without discoloration. This is a follow-up to our technological development in 2018 when welding brass (Cu 60%, Zn 40%) without discoloration became available. This latest development allows welding applications to double-curved products or complex curvatures.
Click here for more information on Kikukawa’s technology to weld brass without discoloration
The new methodology relies on fibre laser welding. While fibre laser welding implements deep welds with minimal welding discoloration or distortion in comparison to TIG welding, it still left a red heat tint surrounding the welding bead. This cosmetic impact limited the availability of hairline (HL) finish or PHL (vibration) finished bronze in architecture, as these finishes take advantage of the bronze’ metallic texture and are unforgiving to any cosmetic imperfections such as discoloration or dents. Thus, this new development expands the design availability for high-end projects requiring high-quality and high-strength bronze products.
Pictured below is a mock-up of Bloomberg European Headquarter’s interior ramp. Such complex designs are now achievable with bronze using its original texture.
Click here to find out more about Bloomberg European Headquarter’s Ramp, sample pictured above
Click here to find out more about Kikukawa’s fibre laser welding technology
*Bronze: As a metal architectural construction specialist, Kikukawa specifies the bronze alloys in three categories; copper (Cu 99.9%), bronze (Cu 90%, Zn 10%), and brass (Cu 60%, Zn 40%). The differences are observable in colour, which can be viewed in our bronze finish samples page.
Click here to view our bronze finish samples. Differences can be best observed through ‘D-PHL (Vibration) Finish with Glossy Clear Lacquer Coating’ finished samples
July 7, 2020
Kikukawa provides various metal constructions and metalwork, including those requiring casting.
Casting, a process of moulding liquid metal into the intended shape, is best suited for large-lot productions, or designs with complex shapes and details that are difficult to achieve with bending.
By combining Kikukawa’s expertise and in collaboration with related companies, Kikukawa provides bespoke casting for various metals and finishes.
Here is an example – a project with aluminium casting completed in 2015, a relief wall for the living quarters of a temple in Tokyo.
The aluminium casting achieved a stately bespoke wall of lotus flowers, a Buddhist symbolism.
The relief wall of roughly 36㎡ , was created from a single 350mm by 350mm square aluminium casting. Nine castings were combined into a 3 by 3 square to create the standard pattern. To create diversity in design, a number of the castings were turned over or rotated. Each was then finished with fluoro-resin paint coating.
The difficulty in this casting stems from the sharp edges of the flowers, a challenge overcome by various fabrication tests and modifications. Kikukawa’s expertise ensured the quality of the casting, as well as the fixing details that achieve both strength and transparency.
To further ensure the quality of the product, Kikukawa assembled the products within the factory to understand the final adjustment necessary.
As the client was very pleased with this lotus flower relief wall, additional casting relief walls were adopted for other areas of this project.
In addition to the project listed above, Kikukawa has experience in casting other metals. This, in combination with other metalwork, allows us to provide the best-suited metalwork solution in price and quality for metal constructions.
Kikukawa also has extensive experience in religious architecture with complex designs and those requiring precision.
Please do not hesitate to contact us for feasibility or consultation.
Click here to learn more about Kikukawa’s religious architecture
June 23, 2020
Tsuchime is Kikukawa’s proprietary Tsuchime (hammertone) finish and is popular for interior construction, or other ornamental goods.
Pictured below is the renovation project for a tenant of the Shinjuku center building. Kikukawa provided the aluminium door plates for the automatic pull door.
Given the client’s intent of utilizing a ‘unique interesting finish’ for the door, Kikukawa provided various finish options. Amongst these, the Tsuchime (hammertone) and black anodization finished aluminium was chosen for its chic and sophisticated physique.
The doors are composed of 850mm wide and 2390mm high aluminium finished with Tsuchime (hammertone) TM-1* and black anodization with a matte clear coating. As the anodization is a finish that makes full use of the material texture, careful attention is paid in every step of production for QC control. Kikukawa’s craftsmen and knowhow resulted in an impeccable Tsuchime (hammertone) finished door.
*TM-1 is Kikukawa’s proprietary standard Tsuchime (hammertone) finish. Please view our material finish samples page for more information.
Applying a Tsuchime (hammertone) finished door was difficult, as the Tsuchime (hammertone) application results in the warping of the material. Kikukawa’s craftsmen have the QC control knowhow and expertise to apply Tsuchime (hammertone) finish and ensuring flatness of the material for a piece as large as 1meter by 2.5meter. Any distortion was corrected with care, resulting in the pieces nestling perfectly onto the automatic doors.
Kikukawa’s Tsuchime (hammertone) finish is available in bronze alloys, and in other Tsuchime (hammertone) patterns. We are also able to produce patterns based on design intent, thus please consult us for feasibility or for more information.
Click here for more information on Tsuchime (hammertone) finish
June 9, 2020
‘Zinc Phosphate Coating’ realizes warm, natural textures that are difficult to achieve with paint coatings. As the texture results from chemical reactions, the patterns are unique. Its’ textures change with aging, tuning into the atmosphere of the environment over time. This finish is gaining popularity in architecture as panels, and as interiors such as fittings, counters, and other decoratives.
Click here to view zinc phosphate coated steel, amongst other steel finish samples
As the texture is achieved through chemical reactions, this finish is an art as much as it is science. The difficulty of the quality control of the tones and patterns limits accommodating fabricators and thus the availability of this finish.
Given the popularity of the finish, however, Kikukawa has established know-how and quality control methodologies that allow us to provide zinc phosphate coated finished products with high-quality. Below is an example of a project that utilized this unique finish.
Pictured is an interior of a university in Tokyo. The reception counter and the lighting box were renewed and decorated with a dark Phozinc (PZ-03), galvanized and zinc phosphate coated steel.
The L shaped lighting box is 200mm wide and 230mm high, fabricated from 3.6m, and 2.5m long 2.3mm thick steel. The dark Phozinc (zinc phosphate coated) side panels are flush, leading to a sophisticated space.
The 350mm wide reception counter panels are fabricated from 2.3mm steel, shaped into an L with 2.5m and 2.5m long panels. For a clean finish, the corner is installed with a bespoke panel fabricated from two 600mm sheets.
The beauty of zinc phosphate coated finish stems from its unique patterns that are formed by chemical reactions that are affected by factors such as the material thickness, shape, chemical composition, weather, and others. Therefore, please consult Kikukawa on availability or feasibility before selecting this finish for your project.
Click here for more information on zinc phosphate coating
Click here to view more projects with zinc phosphate coated panels
June 5, 2020
June 5, 2020 – Kikukawa released the following press release in Japanese.
-Summary of the press release-
Kikukawa, a bespoke architectural metalworker, announced that online services for KCT Metals, the semi-bespoke architectural metal material department, are now available.
Click here for the press release in PDF (Japanese):
2020.6.5 Kikukawa News Release (Web Communication)
May 26, 2020
May 26, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, announced that it will release a video of one of its metal crafting technology, fibre laser welding. This video is only available in Japanese, however, it shows the machine in action and displays samples that highlight the benefits of this technology.
May 26, 2020
Kikukawa’s perforating technology implements various designs including artistic facades.
Our perforation diversity is a product of our substantial collection of machinery and dies in combination with the craftsmanship, which allows us to select the most suitable fabrication methodology and details.
Listed below is an example of a bespoke perforation façade artwork that fully utilized our craftsmanship, a renovation project for the Shin-Narashino Station of Keiyo Line in Chiba, Japan.
Click here to find out more about Kikukawa’s perforating technology
The client, JR East Railway Company, has been working on ‘Keiyo Bayside Line Project’ to add value to the areas surrounding the Keiyo line. As a part of this project, the windscreen of Shin Narashino Station was renewed in collaboration with the Chiba Institute of Technology, a local university.
The design motif is the silhouette of trees, to emphasize and make the most of its surrounding environment. The silhouettes emerge with the perforation.
Designed similarly to a folding screen, the façade is fabricated by high corrosion-resistant 3.0mm thick aluminium alloy, and is 8.4m in width, 5.7m in height and 600mm in depth.
The screen consists of ten trapezoid bent panels, each joint occurring at the peaks and valleys of the folding screens. The trapezoid panels are 700mm to 1200mm wide and are alternately placed to create the unique physique.
The silhouette of the nine trees is implemented by carefully calculated circular perforations. And the panels are finished with light chestnut coloured fluororesin paint coating.
Two types of metalwork are involved in crafting the trees. The typical panels are perforated with 35mm and 22mm diameter circular perforation with dies. The edges are laser cut to create unique varying crescent shapes so that the vertical line is enhanced.
As the sun shines into the station, the perforated tree silhouette becomes shadows – an effect sought by the designer yet considered difficult during the design phase. In doing so, the client was extremely satisfied with the projects’ results.
The sign panel sized 4300mm in width, and 1050mm in height is crafted from a bent 2.5mm thick aluminium. All finished with fluororesin baked coating with the specified colour; panels in wood grain patterns and the words in green or black.
For more information, consultation or feasibility on perforation or metalworks, please do not hesitate to contact us.
Click here to learn more about Kikukawa projects with perforation
May 13, 2020
For many pioneering architectural projects, bespoke and uniquely shaped metal ornaments are used. Having specialized in bespoke metal architecture, Kikukawa has a history of providing services for such projects from design to installation.
In light of the upcoming Tokyo Olympics, we introduce a piece from the previous Tokyo Olympics of 1964.
Many of the buildings or infrastructure built for the 1964 Tokyo Olympics are still in use today. One of the most famous examples is the Nippon Budokan.
The building was built and opened in November 1964 to celebrate and host the first Judo Olympic Games.
Designed by Mamoru Yamada, the building has a gently curving octagonal roof adorned with a ‘Giboshi’ on top.
The design is said to be inspired by Mt. Fuji, while others believe that the octagonal shape offers a better view from the audience.
Kikukawa was involved in the metal construction of the interior ceiling, exterior gables and the ‘Giboshi’.
*The ‘Giboshi’ is a type of ornamental finial, shaped much like an onion. It is believed that the shape of ‘Giboshi’ is inspired by the Buddhist ‘Hoju’ or from an onion, which was once believed to protect one against evil spirits for its unique scent.
The ‘Giboshi’ of Nippon Budokan is 3.35m high with 5.15m diameter. It is fabricated from 64 pieces of 1.5mm thick brass sheets, cut and curved one by one, and bolted on site.
To sustain its unique shape, the ‘Giboshi’ is supported by steel frames. The frames were split and brought onto the site so the brass sheets could be placed on-site for installation.
As shown, Kikukawa is able to provide services for highly specialized and unique metal constructions from design to installation. For more information or to consult the feasibility, contact us from the form below.
April 30, 2020
April 30, 2020 – Kikukawa released the following newsletter in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, fabricated a bespoke chair entitled ‘Shades of Brunelleschi’ in collaboration with designer Toshiki Omatsu*. The project required experimentation, and its success relied on the use of fibre laser welding technology.
Click here to find out more about fibre laser welding technology
Click here for the newsletter in PDF (Japanese):
2020.4.30 Kikukawa News Release (Fibre Laser Welded Chair)
*Toshiki Omatsu is a lecturer from the renowned Kuwasawa Design School. He also owns his own architectural design office, Toshiki Omatsu Atelier.
Click here to learn more about Toshiki Omatsu
April 28, 2020
Kikukawa developed a finish that was previously considered to be technologically difficult – a combination of vibration and anodization for aluminium. This finish is featured on our Aluminium Finish Sample Book, along with the same vibration and anodized samples in silver and champagne gold.
The following pictures are from a façade renewal project within Tokyo.
The panels are finished with vibration and black anodization to achieve the design intent, a ‘deep black’ nuance that is difficult with black paint finish.
Kikukawa’s panels are placed at the entrance façade, the eaves soffit, and the pillars at the corner. The specifications of the alulminium panels are 5.0mm thick aluminium with cut-edge details of maximum size 1363mm and 3425mm, finished with vibration and black anodization.
As shown, Kikukawa is able to suggest and develop various finishes to implement the design intent and provide services for metal constructions from design to installation.
For more information or fabrication or construction feasibility, and consultation, please contact us.
April 14, 2020
Kikukawa has the knowledge and experience to reconstruct or provide services for relocation projects with strict or challenging conditions.
The following monuments, Flying into the Rainbow (also known as the Blue Wings) and Coloured by the Rainbow (also known as the Rainbow Wings) were relocated from Haneda Airport to the Tamagawa Academy. The monuments were designed by the artist Naoya Sakagami and produced by Arts Associates Yatagarasu.
Prior to the relocation, the two monuments were placed within the south and north meeting area of Haneda International Airport Terminal One, Arrivals lobby. The monuments have watched over various travelers for 25 years (1993 – 2018) until the relocation to Sakagami’s alma mater Tamagawa Academy which was decided upon the terminals’ renovation.
The Blue Wings were placed within the concert hall of Tamagawa, while the Rainbow Wings were placed within the atrium of Stream Hall 2019, a new facility built for global education.
The two monuments are coated with a stainless finish that is unique to Sakagami and composed of 6 lines of carefully polished crystal prisms, and 11 spectrum creating gratings which included products that cannot be reproduced today. Therefore, no mistakes could be made within this relocation project.
Based on experience and partnerships from previous projects, Kikukawa was entrusted with this mission from dismantling in Haneda to installation.
The Blue Wings are supported at one point, equivalent to its previous installation at the Haneda Airport. The key to this installation is the rainbow that appears when appropriate natural lighting or illumination is shone through the crystal prism or the gratings at the torso. Since the previous installation drawings from 25 years ago were lost, Kikukawa’s team on-site measured and calculated the best placement for this monument.
The Rainbow Wings were installed to appear flying within the atrium of the facility, therefore, the foot base of the monument was cut off. To balance the monument in space, the monument was placed on a foundation for support, then hung by six 4170mm to 8025mm of stainless-steel wire.
As shown, Kikukawa is able to provide high-quality services for relocation projects with strict requirements.
Click here for more information on Naoya Sakagami’s artworks
March 31, 2020
Bronze alloys are often chosen in architecture to create chic or high-end space. However, bronze may be replaced with stainless steel due to material availability and procurement. In such cases, sputtered or electro-chemically coloured stainless steel may be considered – however, these finishes have limitations in post-coloured metalworking.
The following decorative partitions combine stainless steel round pipes and bronze colour clear coating to overcome the limitations listed above.
The welded joints are finished carefully into a mirror-polish, then finished with a coloured clear coating that maintains the metallic and a bronze-like surface. This fine-detailed piece of artwork adorns the high-end grill and restaurant in Marunouchi, Tokyo.
These decorative partitions imitate musical notes and staff notation – the staff lines are 13mm thick round pipes, 3.6m high from the floor to ceiling. The left partition is 2090mm wide of 125mm depth covered by 3 rows of randomly placed round pipes. The right partition is 2560mm in width and has 5 rows or round pipes covering 240mm depth.
Depending on the placement and the installation angle, there are 6 types of oval plates. All are welded; the top half from the ceiling are welded from above, and the other half are welded from the bottom to minimize the visibility of the welding marks. These pipes are framed into a unit; the top frame is coloured white to assimilate the ceiling, and the bottom finished with mirror-polish and bronze colour clear coating.
Pictured above is another decorative ornament inspired by musical staff, placed in a different area of the same establishment. The 9mm square pipes are hairline finished and bronze colour clear coated, similar to the other partitions.
The bronze colour clear coating of this project was finished within Kikukawa’s factory to ensure the colour and quality of the product. Coloured clear coating is suitable for interior projects requiring metallic or high-end space.
Please consult us on the availability and specifications.
*Coloured clear coating is a finish for interior projects. Please consult us for use in exterior projects to ensure the suitability of the specifications.
March 24, 2020
March 24, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, announced that it will release a video of one of its metal crafting technology, incremental forming.
February 13, 2020
February 13th, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the release-
Kikukawa, a bespoke architectural metalworker, will receive the honourable mention award in the exceptional technology area for the 25th Annual Chiba Genki Company Award. This is a series of awards rewarded to companies with innovative technology or management within the Chiba prefecture. Roughly 70 companies applied, and 10 including Kikukawa received the award.
Noted technology includes Kikukawa’s KCT (Kikukawa City Texture) series, a line of semi-bespoke architectural products, and the ‘Invisible Access Panel System’.
Click here for the press release in PDF (Japanese)
Click here for more information on the ‘Invisible Access Panel System’
February 3, 2020
Typically, metal panels are constructed and designed to achieve a flush surface. In recent years, other attempts are made – such as the construction of peaks and valleys with geometric shapes and angles, much like a kaleidoscope or origami art.
The implementation of a wall with protrusions requires various abilities from the manufacturer – such as details considered in 3D, or the ability to fabricate and conduct precise installations. Kikukawa has the expertise and technology to respond to these various requirements and ensure the construction of a project with high-quality metal panels.
These photographs capture the aluminium ‘Origami Panels’ installed in the atrium of ‘OVOL Nihonbashi Building’.
Origami is an ancient art in Japan, a method to create various shapes and forms by folding a piece of paper. This craft gained popularity overseas and has inspired various architects and designers across borders.
The Origami panels of ‘OVOL Nihonbashi Building’ are formed by 4~9 pieces of variously shaped and sized panels creating triangular peaks and valleys. The depth of these peaks is maximum 400mm.
The typical details of these panels are off-white coloured fluorescein baked coated 3.0mm thick aluminium of 1150mm width and 3150mm high.
The installation of these panels requires precision, to ensure clean joints horizontally, vertically and for peaks and valleys – thus requiring precise positioning in x, y and z-axis.
Kikukawa’s team of designers, craftsmen and installation workers are able to work flexibly from designing details in 3D to ensure the high-quality of the project.
Therefore, please do not hesitate to contact Kikukawa for fabrication feasibility and consultation.
Click here to contact us
For more information on ‘OVOL Nihonshibashi Building’, click here
January 28, 2020
Every year, KIKUKAWA fabricates pentagon shields, “Hounou-date”, to pray for safety and prosperity in the upcoming year and to exemplify our New Year’s resolution. On the shield, there are three objects that denote the Japanese Kanji character for water, 水. Each object symbolizes our prayer: the “sword” to ward off evil, the “sickle” to bring a good harvest, and the “key” for prosperity.
The root of this tradition lies with Japanese blacksmiths fabricating “Hounou-date” as a talisman against fire. By dedicating a shield with a water kanji at the beginning of the year, the craftsmen cleansed their workplace and prayed for another safe year.
KIKUKAWA still honours this practice as a sign of respect for the artisan handiwork. To hone and pass on our craftsmanship, the fabrication of the shield is carried out by younger members and Vietnamese trainees.
As per tradition, three key materials and finishes were chosen.
These shields are on display at various places within our Shiroi factory.
Click here to view a selection of Kikukawa’s finish samples
Click here to find out more on sulfurization
December 20, 2019
Listing updated or added contents during 2019.
30 Oct. 2019 Project Gallery: Ryogoku Yuya Edoyu
25 Oct. 2019 Project Gallery: Fukuda Art Museum
26 Sep. 2019 Technology: Anodization for Architectural Metal Constructions
9 Sep. 2019 Project Gallery: Akasaka Intercity AIR
2 Sep. 2019 Project Gallery: Shin-Marunouchi Building
29 July 2019 Technology: Polished or Grinded Finish
19 July 2019 Project Gallery: COS GINZA
26 June 2019 Project Gallery: Marunouchi Building
18 June 2019 Project Gallery: ZARA Minamiguchi (Shinjuku)
13 June 2019 Project Gallery: POLA Gotanda Building, Crystal Lobby Retrofit
5 June 2019 Project Gallery: Alpha Grande Koiwa Sky First
31 May 2019 Technology: Outsized Metal Claddings (Extra-wide, Extra long)
31 May 2019 Kikukawa Policies
23 May 2019 Project Gallery: Univ. of Tokyo, Hongo Campus. Faculty of Engineering Bldg 3
21 May 2019 Technology: Tsuchime (Hammertone)
15 May 2019 Project Gallery: Kokugakuin University, Academic Media Center (AMC)
9 May 2019 Technology: Metal Column Covers
22 Apr. 2019 Project Gallery: EQ House
16 Apr. 2019 Project Gallery: National Showa Memorial Museum (Showa-kan)
15 Apr. 2019 Project Gallery: Sundai Preparatory School, Kashiwa
20 Mar. 2019 Project Gallery: Sumitomo Fudosan Onarimon Tower
27 Feb. 2019 Materials and Brochures: Round Column Cover (bottom of the page)
14 Feb. 2019 Project Gallery: Art Tower Mito
8 Feb. 2019 Project Gallery: Osaka University of Arts, Arts & Science Dept.
29 Jan. 2019 Materials and Brochures: Invisible Access Panel System
December 17, 2019
Based on our expertise in bespoke metal -craft and metal construction, Kikukawa is able to consult and provide assistance to cutting-edge architectural projects from design to production and advisory on installation.
Provided below is such an example.
On the platinum street of Shirokanedai stands ‘Unhex Nani Nani’, a verdigris office building completed in 1989.
The unique building is designed by Philippe Starck* and detailed by Makoto Nozawa + GETT. The design intent is said to be a green monster rising from a swamp. The puzzlement that the project may invoke and the playfulness of the design may be represented by the name of the building, Nani Nani, rooting from the Japanese word ‘Nani’ meaning ‘what is it?’
In close collaboration with the architects, Kikukawa constructed the turquoise patinated bronze exterior.
At the time, given the complexity of the design, a 1/130 mock-up was fabricated with plaster mold so that the overall shape was understood upon each discussion.
The building is covered in 1360㎡ of patina green finished 1.5mm thick copper sheets, each metal-crafted into the required shape. The most suitable crafting methodology was chosen by our expert craftsmen in observation of the required shape: each sheet was laser cut into the required curved shape, then dual-curved through bending, stretching or striking.
The most challenging area to craft was the hat, with the most R curvature, which was fitted onto a full-scale frame to inspect the precision and quality before shipment.
The selected finish, patina green, creates the blue and green shades of bronze oxidation that would otherwise take decades to form. Bronze alloys change from its original shade of pink-tinted amber to dark brown, to turquoise. Both the shades of brown and blue/green is favored for its rich texture and stately metallic shades for various architectural constructions.
For projects requiring other metals, patina green painted finish may be applied.
By combining various metal-works and selecting the most suitable methodology, Kikukawa is able to shape various architectural constructions to completion, in close collaboration with the architects and contractors.
To learn more on Kikukawa’s dual-curving technology, click here
To view our bronze finish samples, click here
To make an inquiry, click here
To view Philippe Starck’s webpage, click here (exterior link)
To learn more about Makoto Nozawa + GETT, click here (exterior Japanese link)
*Philippe Starck: A Parisian designer born in 1949. His design works range from product to interior, exterior and architecture. Within Japan, his famous works include the aforementioned ‘Unhex Nani Nani’ and the Asahi Beer Headquarters building.
November 26, 2019
Kikukawa is able to propose various metals and finishes based on the requirements of the project, with expertise from years of bespoke metal construction.
To show the diversity of the metal finishes available at Kikukawa, the following is a selection of black metal finishes.
Note that the colour – black – is not sufficient to select a finish: factors such as gloss level, the shade of the colour, texture or consistency affect the materials’ appearance and its applications. (Please note that the pictures may not fully capture the nuances or the texture of the finish – thus please confirm the finish with an actual sample.)
■Black Oxidized Coating
Projects requiring matte black finishes may want to consider this black oxidize coated steel.
Black oxidize coating is a chemically applied coat of oxidization, which prevents further oxidization and rust. As the coating process is applied under room temperature, the metal is not exposed to risks of heat-induced deformation or discoloration.
■Casted Paint (Matte Black)
This finish recreates the uneven surface of casted steel with paint. As the finish may be applied to non-casted products, a casted physique may be applied to products of shapes and sizes that are otherwise unavailable. This paint finish is also applicable to aluminium.
The flatness of the surface and gloss-level may be adjusted.
■Piano Black
By adjusting the flatness of the surface and applying a coat of high-gloss clear coating, the casted paint physique transforms into this high-end bespoke paint finish that is reminiscent of a grand piano. This finish uses urethane paint and is applicable to aluminium.
■Vibration Pattern Polishing and Anodization (Black)
For projects requiring metallic appearance that cannot be implemented with a painted finish, vibration (PHL) polished and anodized aluminium may be your choice.
■Hairline Pattern Polishing and Black Nickel Plating
Projects requiring metallic textures with high resistance may want to consider the black nickel-plated and hairline polished stainless steel. As this finish creates a surface with natural hues of black, it is best for a context requiring inconsistent texture.
■Coloured Stainless Steel
Black stainless steel may also be actualized by colouring, which may be applied chemically, sputtering or electrolytic colouring.
■Sulfurization
For projects requiring a tint of black, and considering a high-end finish, sulfurization of bronze may be suitable. Bronze sulfurization is a process that recreates the rich brown textures of aging bronze by hand. By quality controlling the process, Kikukawa is able to provide various shades of dark brown.
Click here for more information on sulfurization
■Zinc Phosphate Coating
A tint of black with the metallic and stately texture of steel are available by applying zinc phosphate coating, a finish that chemically applies an insoluble crystalline layer. As this is a chemical process, the resulting tone and pattern vary depending on various factors including the composition of the material, thickness or shape.
Click here for more information on zinc phosphate coating
As shown, a wide range of ‘black’ metal finishes are available at Kikukawa. As experts in metal craftsmanship and construction, Kikukawa is able to select the most suitable finish as required by the project from the aesthetics, function to cost. We propose and provide comprehensive solutions to various metal constructions with our never-say-no spirit.
Please do not hesitate to contact us from the availability of the finish, its application to other consultations on metal constructions.
November 25, 2019
Four new brochures on Kikukawa’s metalworking technology has been released.
The brochures cover FSW (Friction Stir Welding), fibre laser welding, incremental forming, and 8m bender. Each technology was introduced on our corporate website, however, were made into a brochure in light of requests to view them offline.
The full-colour brochures present a quick overview of the technology, workable dimensions, pictures of samples and projects implemented.
The metalworking technology covered are rare in architectural metalcraft; some are still under research to further the technology.
【FSW (Friction Stir Welding)】
One of the latest technologies to join flat pieces of metal using frictional heat and mechanical mixing process. The resulting joint has high weld strength and minimal heat affected distortion or discoloration.
Click here to view the new brochure
Click here to read more on FSW (friction stir welding)
【Fibre Laser Welding】
Using the latest robotics and welding technology, high-quality welding with high strength and minimal distortion and discoloration. Suitable for long-distance welding, curved and complex welding.
Click here to view the new brochure
Click here to read more on the fibre laser welding
【Incremental Forming】
A dieless metalworking methodology that accommodates complex shapes, and small lots of high variety product line. Accommodates testing and sample fabrications.
Click here to view the new brochure
Click here to read more on incremental forming
【8m Bender】
One of the largest bending machines in the industry implements high-quality long bends up-to 8000mm. Accommodates simple bends to complex bends such as corrugation and tapered bends.
Click here to view the new brochure
Click here to read more on 8m bender
Please do not hesitate to contact us for more information on each metalworking technology.
Click here to contact us
November 19, 2019
November 19, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, celebrated its 86th anniversary in business on November 1st, 2019. During the celebratory ceremony, Kikukawa commended workers with outstanding results on the new personnel evaluation system, challenge system.
Click here for the press release in PDF (Japanese):
2019.11.19 Kikukawa News Release(86 anniversary)
October 21, 2019
At Kikukawa, we provide outsized architectural panels with thin joints. Typically, joint details are designed at roughly 15mm, however, Kikukawa is able to answer requirements of up to 5mm thin joint details. As an example of this, we provide the following pictures of the stainless-steel wall panels of Kikukawa Group Tokyo Office.
Twenty-seven Silky blasted* exterior wall panels cover roughly 120㎡ of staircase walls from the 1st to 3rd floor.
By using a hooking detail, panels of maximum 1570mm(W) by 4950mm(H), and 250kg are installed with a 5mm thin joint details. In order to create a seamless ambience, door handles or keys are designed so that there are no protrusions.
As only one face of the staircase is installed diagonally, the joint of the 1st to 3rd floor is connected in a spiral.
Installation of thin joints require high precision as a divergence of 1mm becomes visually observable. Kikukawa has the expertise to install the panels precisely and carefully, without scratches or damages, in accordance with the drawing in installation placement and flatness.
There are other examples of Kikukawa’s stainless-steel panels installed with thin joints. At Aga Khan Centre of London (UK), 3.0mm thick stainless steel is installed with 5mm thin joints to create an octagonal column. Within Japan, the balustrade walls of the Japanese Sword Museum are installed with the same details of 3.0mm thick stainless steel with 5mm thin joints. (Kikukawa’s stainless steel panels are also utilized in the main and sub-main entrance area with 4.0mm thick stainless steel with 6mm thin joints details.)
At Kikukawa, we provide thin joint installations for metal façade constructions, including stainless steel, aluminium alloys and bronze alloys. Please do not hesitate to contact us for feasibility including the implementation of designs with thin joints.
For more information on ‘Kikukawa Group Tokyo Office’, click here
For more information on Silky blasting finish, click here
For more information on ‘Aga Khan Centre’, click here
For more information on ‘The Japanese Sword Museum’, click here
*Silky blast: bead blasting (a surface preparatory finish) elevated to a high-quality surface finish with Kikukawa’s proprietary technology and expertise
October 8, 2019
Black nickel plating is typically applied as a functional, or as a decorative finish in various industries including glasses, automobiles, cameras, and interiors.
For this project, Kikukawa fabricated exterior panels over 2m by collaborating with an electroplating partner company. The design required a metallic yet uneven dark finish to create a natural hue; the selected black nickel-plated finish is a rich textured finish that implements this.
These pictures are the first-floor exterior panels of ‘Mitsui Garden Hotel Ginza-Gochome’.
The 3mm black nickel-plated and HL finished stainless steel panels are maximum 1200mm by 2070mm with cut-edge details. The coarse HL finish creates the dark and metallic hues of the material, contributing to a classic and chic atmosphere.
The black nickel-plated and HL finished panels are QC controlled so that the right hues of dark plating are created.
This project and the usage of this finish is an example of Kikukawa challenging itself to utilize finishes that have not been used as an exterior finish in the past, in order to implement the design intent.
Please do not hesitate to consult us on new finishes or design implementation.
Kikukawa participated in a related project that houses ‘Mitsui Garden Hotel Nihonbashi Premier’.
Click here to find out more about this project, ‘OVOL Nihonbashi Building’
September 24, 2019
Kikukawa provides comprehensive solutions for metal constructions from design to installation. This ability comes into its own for creative or cutting-edge projects and those with dual curved or complex designs.
As an example of this, we introduce the ‘webframe’ of Iidabashi, a green framework with a networked configuration that covers the ceiling of Iidabashi subway station of Toei Oedo line. Over 1300m of fluorescent green painted steel pipes that function as a ceiling and lighting are webbed, undulated and spread across the escalator ceiling. This project was completed in 2000, and subsequently won the Architectural Design Division of the AIJ (Architectural Institute of Japan) prize in 2002.
This ‘webframe’ was designed by Makoto Watanabe, the numerous award-winning architect (including JIA, Japan Institute of Architects, Rookie of the Year award), best known for designing ‘Aoyama Technical College’ and ‘Shin Minamata Station.’ The Iidabashi station project is also known as the first ‘algorithmic designed*’ architecture to be implemented.
The design intent was to turn the long monotonous escalator hall into a fun space, thus the concept was ‘to show the structure of the space by minimizing the ceiling or wall panels’. The ‘webframe’ resembles the growth of plant roots extending towards the ground, where the wing shaped ventilation tower stands.
The ‘webframe’ extends from B6F to B1F, covering a concrete exposed space of roughly 55m in length and 15m in width, including the stair landing.
The webbed structure is ‘lifted’ in various places by virtual ellipsoids, designed with 3D CAD (CADCEUS), a design attempt that was ahead of its time, and implemented through polygonal pipe frames.
The main material of the ‘webframe’ is 2.3mm thick, 76.3mm diameter steel spheres and 2.8mm thick, 76.3mm diameter steel round pipes. Both are finished with fluorescent green urethane resin paint.
The fabrication difficulty was in the cutting of the round pipes for built-in lighting, and the contact point of the webbed structure.
The difficulties in metalcrafting the round pipes were overcome by our craftsmen coming together to understand and resolve each issue.
The contact point, hereinafter named the joint, of the webbed structure is crafted by all around welding of round pipes to the spheres in various angles. The joints alone amounted to over 1000 pieces, thus an automatically deployed 3D-CAD program, a specialized jig, and 20 assembling craftsmen came together to craft the ‘webframe’.
The installation of the project was limited in time, thus Kikukawa considered various factors from the design stage to conduct a high standard installation. For example, each joint and the extending round pipes are connected by a joint sleeve that allows length adjustment onsite. Installation sequence was carefully negotiated and decided to ensure the accuracy of the installation: our conclusion was to carefully measure the placement of the joints and fix them with hanging bolts and wires, then connect the round pipes to create the webbed structure.
This project showcases Kikukawa’s ability to accommodate design process requirements ahead of its time, provide metal craftsmanship that realised high precision cutting of round pipes and all-around welding, the ability to control and manage the complex projects in all divisions, and the ability to implement high standard installation under limitations.
Kikukawa will continue to work on providing a comprehensive solution to implement various designs.
Click here for more information on Makoto Sei Watanabe / Architect’s Office
*Algorithmic design: A method of architectural design that uses certain algorithms (such as parameters) to create shapes and models
September 18, 2019
September 18, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the release-
Kikukawa, a bespoke architectural metalworker, announced that a special exhibition on Kikukawa and Pritzker Prize-winning architects are now available at Kikukawa’s new sample showroom, ‘Studio K+’. This exhibition is to commemorate 50 groups of visitations to ‘Studio K+’ since its opening in April.
Mini-cymbals were also newly added to the ‘metalcraft experience booth’ for visitors.
Click here for the press release in PDF (Japanese):
20190918 News Release (Studio K+ Pritzker Exhibit, Mini Cymbal)
September 10, 2019
The face of the building, such as the metal panels at the entrance, influence the impression of the entire building. Thus, high-quality is required of these panels in aspects such as the colour, flatness, and precision in fabrication and installation (in mm).
Within Japan, typical metal ceiling panels at the entrance have simple shapes with cut-edge details. At Kikukawa, we provide a comprehensive solution for metal constructions: that is design assistance that enables high-quality in both functionality and aesthetics, fabrication with quality control knowhow, and precise installation for panels, frames, and sub-structures.
The following pictures are from the ‘International University of Health and Welfare, Department of Medicine, WA building’ constructed in Narita Campus (Narita City, Chiba Prefecture) in 2017.
As a space that welcomes worldly researchers and guests from around the globe, the aluminium cut-edge detailed ceiling panels at the entrance atrium were required in high quality.
The typical details of the 600㎡ aluminium ceiling panels are 3.0mm thick, 1185mm by 1843mm with cut-edge details. The five rows of the ceiling panels are separated by 300mm slits, while each panel joint is set at 15mm.
The final inspection is done by machine and visually to ensure the quality. By fabricating a mock-up, we are able to inspect the joints and the panels from various angles.
The mechanical inspection includes that of flatness, and colours (thickness of the coat, colours and gloss level). These ceiling panels are finished with white-tinted gray acrylic resin paint coating with 50% sheen.
Minimal or simple architectural designs tend to require strict quality control, and each construction project has different quality requirements. Kikukawa has the expertise and craftsmanship to understand and answer these various requirements.
August 27, 2019
August 27, 2019 – Kikukawa released the following newsletter in Japanese.
-Summary of the newsletter-
Kikukawa, a bespoke architectural metalworker has announced that it has installed outsized mirror-polished stainless steel for a Lithuanian project, ‘Boksto 6’. The panels total to 450㎡, and two installation advisors from Kikukawa traveled to the site to oversee the process. This is considered to be the first time a Japanese metal construction company takes on such efforts in Lithuania.
Click here for the newsletter in PDF (Japanese):
2019.08.27 Kikukawa News Release (Installation of Lithuanian Project)
For more information on Kikukawa’s oversea projects, click here
August 22, 2019
Kikukawa provides metal constructions with metal mesh. The following examples feature bespoke mesh; one that creates a gradation by changing the wire opening pitch and the other a ‘pressed mesh’.
Metal mesh provides design, functionality, and visibility thus are often selected for decorative interiors or for spaces that need an open atmoshpere.
The term ‘metal mesh’ typically refers to metal round bars that are welded or woven. Depending on the material, joint details, opening pitch or finishes, there are endless variations. For instance, the joining details may be welded, pressure bonded or woven, and the weaving patterns may be plain weaved, twilled or clamped. The materials of metal mesh include stainless steel, aluminium, or brass.
Typically, when metal meshes are selected, one pattern is used consistently. However, in cases like Kikukawa Group Tokyo Office, the patterns of the metal mesh covering the interior wall, exterior wall, and the atrium create a gradation by changing the opening.
The joints of the mesh wall are tied to prevent disintegration, the top details are hooked, and the bottom details are pulled so that the mesh does not waver when touched.
The metal mesh introduced has large openings that create a simple, open and unique space. Metal mesh with smaller openings is used as a decorative accent for its luxury and shine.
Metal mesh with the smaller opening can be used as-is, or metalworking with dies or embossing may be combined. Metal mesh with this metalworking are called ‘pressed mesh’, and various designs can be implemented by changing the material, pattern or the metalworking methodology.
The possibilities of the design with metal mesh expand when used in collaboration with acrylic, glass or wood. Please do not hesitate to contact us for fabrication feasibility or detailed designs.
August 20, 2019
August 20, 2019 – Kikukawa released the following newsletter in Japanese.
-Summary of the newsletter-
Kikukawa, a bespoke architectural metalworker participated in two projects amongst the 15 projects that received the 60th BCS prize*. The winning projects are ‘Tokyo Midtown Hibiya’ and ‘Akasaka Intercity AIR’. As metal-craftsmen and engineers, Kikukawa worked closely with the projects’ architects, contractors, and other suppliers to ensure that the design intent was delivered.
*BCS prize was founded in 1960 by the Building Contractors Society (BCS) to recognize excellent buildings of the year.
To find out more about the BCS Prize, click here (external link)
To find out more about Tokyo Midtown Hibiya, click here
To find out more about Akasaka Intercity AIR, click here
Click here for the newsletter in PDF (Japanese):
2019.08.20 Kikukawa News Release (60th BCS Prize)
July 30, 2019
Kikukawa implements various design intent by combining our specialty, metal architectural constructions, and other materials.
The following pictures are from Sugamo Shinkin Bank, Toda that reopened after its move in November 2018. The extra-long aluminium panels have randomly placed wings composed of acrylic plate and stainless steel brackets. These colourfully painted wings create a unique façade.
The aluminium exterior panels are 3.0mm thick, 1125mm (W) and 5865m (H) with cut-panel details. The high gloss white fluororesin baked paint coating was finished with the photocatalyst coating. The photocatalyst coating is a self-cleaning coat that uses sunlight to breakdown contaminations, dirt or stains.
The 173 pieces of 522m (W) and 360mm (H) wings are placed in 8 kinds of angles ranging between 15 and 60 degrees. The 24 varying coloured pieces placed in between acrylic plates and the coloured stainless steel brackets create the colours of the wings.
*The acrylic plates are supplied by the constructors, then assembled into a wing by Kikukawa.
Kikukawa suggests and plans the most suitable installation methodology and plans for the project by communicating with the constructors. For this project, the aluminium panels were lifted to the roof by a rough terrain crane, then installed.
As demonstrated, Kikukawa will create and offer solutions to project designs with metal constructions or metallic designs. Please do not hesitate to contact us for more information.
*The other colourful facades of Sugamo Shinkin Bank can be viewed via the link below.
Click here for more pictures of ‘Sugamo Shinkin Bank, Tokiwadai branch’
Click here for more pictures of ‘Sugamo Shinkin Bank, Shimura branch’
July 26, 2019
Kikukawa is pleased to announce that it is entering into a partnership with Look Façade, a French façade consultant, to intensify Kikukawa’s presence in Europe.
Kikukawa’s catalogs and samples will be on display in Look Façade’s showroom in Paris – allowing architects to view and observe the high-quality and complex nuances of finish samples, and the fine craftsmanship and technology behind our work.
This partnership follows Kikukawa’s success in European projects – its metal craftsmanship has been highly regarded in large-scale projects such as the bronze constructions for Bloomberg’s London Headquarters.
Look Façade is extensively experienced in technical marketing of façade panels. This collaboration will provide European audiences with easier access to Kikukawa’s expertise and high-quality metal constructions.
For more information on Look Façade, click here (external link)
For more information on Kikukawa’s overseas projects, click here
July 23, 2019
July 23, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
Kikukawa, a bespoke architectural metalworker, has announced that a ceremony has taken place on 18th of July to supply 80 sets of full-body harness fan-cooled workwear to its installation craftsmen within Kikuwa-kai*. These full-body harness fan-cooled workwear will improve the working conditions of our installation workers and improve the efficiency on-site.
Click here for the press release in PDF (Japanese):
2019.07.23 Kikukawa News Release (fan-cooled workwear)
*Kikuwa-kai: A group of craftsmen or companies in partnership with Kikukawa.
July 18, 2019
In collaboration with the architects, Kikukawa implements various designs including staircases that appear to be floating.
Kikukawa has a history of consulting and providing solutions in the construction methodology, fabrication methodology, the selection of the material and in installation.
The following pictures are two staircases with intriguing structures that contribute to the creation of open space.
The first staircase is within ‘Palaceside Building’ named the ‘Staircase of Dreams (Yume No Kaidan)’ after its unique structure and design ahead of its time.
The staircase connects the central corridor of the first floor and the underground atrium. The 60mm HL finished stainless steel round pipes and 6mm stainless steel round bars, that are woven into a net, support the aluminium-casted stair-boards.
The ‘Palaceside Building’ itself is highly regarded within the architectural industry, receiving various awards since its completion such as the 9th BCS award (by the Japan Federation of Construction Contractors) or being selected as DOCOMOMO’s Top 20 modern architecture.
Completed in 1967, the staircase now has extra handrails to further support climbers.
The next staircase is from our very own office in Tokyo.
The 216mm PHL finished stainless steel round pipe functions as the handrail and supporting structure for this staircase that connects the 2nd and 3rd floor. The 10mm randomly placed PHL finished SUS round pipes connect the handrail and the glass stair-boards.
The handrail’s L-shaped detail was implemented by drawing and welding.
Implementation of floating staircases requires careful planning in installation methodology and the clarification of factory and on-site fabrications. Therefore, Kikukawa’s ability to undertake consultations from feasibility, detail designing to installation was key to the realisation of this structure.
As shown, Kikukawa realises metal constructions with unique structures or designs with its expertise and craftsmanship from consultation to implementation.
Please do not hesitate to consult us with difficult projects or in fabrication feasibility of architectural metal constructions.
Click here for more information on Palaceside building.
Click here for more information on Kikukawa Group Tokyo Office.
*Kikukawa Group Tokyo Office functions as a metalwork museum that showcases our various metalworking abilities in details and creations such as the bead-blasted stainless steel walls with 5mm joints, 6mm aluminium with square perforations and aluminium expanded metal facade and more.
July 9, 2019
Kikukawa develops new finishes in order to best achieve the designer’s intent. That is inclusive of finishes that were typically considered difficult to achieve.
One example of this is the anodization of decorative grinding finishes. As the anodization process includes chemical etching to clean the aluminium for quality control, the grind marks were thought to fade in the etching process. Kikukawa overcame this difficulty by developing its own grinding and anodizing technology. We provide various finishes that combine anodization and bespoke decorative grinding (or polished) finishes, as exemplified by the picture below.
The following pictures are from a project that utilizes such a finish. The 3mm thick aluminium exterior panels with cut-edge details are finished with vibration (deep PHL), anodization and matte electrodeposited clear coating. As opposed to simple anodization, the matte clear coating provides a chic ambiance, and a unique reflective surface.
The details of the exterior panels are either long 525~625mm (W) by 2400~3085mm (H), or wide with 1435~2280mm (W) by 845~1415mm (H), installed with 15mm joints.
Kikukawa fabricated the aluminium panels at the entrance of the same project; panels with wood-grain patterned flame-resistant approved decorative adhesive sheets. In total, these panels cover 5855mm (W) by 3000mm (H) area.
Kikukawa is able to respond to various bespoke finishing requests, by developing or combining its technologies and expertise. Other grinding (or polished) and anodized finish samples can be viewed from the link below.
Click here to view “Kikukawa’s Aluminium Finish Samples”
Please do not hesitate to contact us for consultation or to develop new finishes that best achieve the design intent.
June 25, 2019
Kikukawa develops its own proprietary technologies as required in order to fulfill the design intent as exemplified by the following examples of bespoke mirror-polished water ripple stainless steel.
In recent years, we have observed the rise in the usage of water ripple (embossed) mirror-polished stainless steel. In response to this, Kikukawa has devised a methodology that would allow us to emboss the high-quality mirror polished stainless steel in selected areas at selected depths, without any damages or scratches.
The pictured embossed mirror-polished stainless steel represents the disturbances of the water in ripples or waves as designed.
These designed ceiling panels use three 1.0mm thick mirror-polished stainless steel with bent details, sized 900m (W) and 1639mm (H).
Given the beautiful reflective properties of mirror-polished finish, any small dents, scratches or imperfections become accentuated. Thus the higher the quality of the mirror-polish, the more difficult it is to apply any metalworking.
Based on the design data, Kikukawa fabricated a special mold that was rolled together with the stainless steel. By doing so, these panels are metal-crafted to have the desired depth of embossing at the designed location.
Being a bespoke architectural metalworker, Kikukawa finds solutions to implement architectural designs and constructions. The development of this particular fabrication methodology is an example of this.
For feasibility on embossing, product shape or combination with other metal finishes, please consult us.
To see more pictures of the mirror-polished water ripple stainless steel project, click here
To view Kikukawa’s projects with high-quality mirror-polished stainless steel, click here
June 18, 2019
June 18, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced that the government subsidy period has concluded for the research on automating dieless dual-curved metal forming technology. With this milestone, Kikukawa reported the summary of the progress to the government on the 31st of May, 2019.
The subsidy began in 2016, as collaborative research with Fukui University to establish a process that would allow the accommodation of a wide variety of small lot custom-made outsized or complex architectural metal products.
Click here for the press release in PDF (Japanese):
2019.06.18 Kikukawa News Release (dual curve metalworking research final report)
June 11, 2019
Kikukawa expands design options in architecture by providing various bespoke paint coated metal constructions: examples of bespoke paint include stone-style, bronze-style, oxidized-style (rust), concrete-style, and patina-green style.
The following pictures are one example; metal louvres were painted in bamboo-style for ceiling louvres at a high-end Teppanyaki restaurant in Marunouchi, Tokyo. The bamboo physique is replicated with acrylic paint and randomly placed black spots.
The bamboo style ceiling louvres are installed at 150mm pitch. Fabricated with round steel pipes of 21.7mm (diameter), the details of the louvres where they meet the walls are carefully designed so that screws or other fixing systems are invisible to the visitors.
The designer’s intent was to replicate the colours of spotted bamboo (bamboos marked with dark spots). The final paint sample was determined after fabricating multiple trials of colour samples on steel pipes.
The bamboo nodes are fabricated by welding two 2.3mm thick 25.7mm (diameter) ring plates parallelly. There are two patterns of nodes, designed with varying pitches.
When architects specify naturalistic materials such as wood, they tend to face limitations in cost, and functionality such as material strength. With metal, these limitations can be solved for its workability and flexibility in details, as well as its variety in finishes. By combining these advantages with Kikukawa’s bespoke construction services and metalworking expertise, we expand the possibilities of realistic designs and provide metals as an alternative to other materials.
Additionally, Kikukawa has expanded its material surface-preparation and paint coating facilities in January of 2019, further allowing us to answer bespoke paint coating requests.
Please do not hesitate to contact us to inquire about bespoke paint coating or fabrication feasibilities in bespoke metal constructions.
To make an inquiry, click here
To view excerpts of Kikukawa’s paint coated metal samples, click here
June 4, 2019
June 4, 2019 – Kikukawa released the following newsletter in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has compiled projects that were built in collaboration with Isozaki Arata, following his receipt of Pritzker Prize 2019. Projects introduced include Art Tower Mito, Oita Prefectural Library, Shizuoka Convention & Arts Center “Granship”, and “Ujian” of Gotenyama Garden.
To find out more about Art Tower Mito, click here
Click here for the newsletter in PDF (Japanese):
2019.06.04 Kikukawa News Letter (Isozaki Arata wins Pritzker Award, Art Tower Mito)
May 28, 2019
At Kikukawa, we meet various metal architectural construction needs, from small sculptures, monuments, large panels, to facades. While our expertise lies in designing details and fabrication of bespoke metal constructions, we also offer a unique line of textures and finishes.
The following Tsuchime-finished (hammertone) Sakura Tree sculpture is one example. By combining the hand-crafted finish and our design, fabrication, and installation technology, as well as our QC knowhow, Kikukawa implemented a unique design for an interior construction project.
The Tsuchime finished (hammertone) copper sculpture is 4000mm in diameter, 17000mm in height, decorated with 2100 pieces of small copper cherry blossoms. The design is inspired by the Japanese cherry blossom trees that transform a riverside walkway to a promenade of white and pink in spring.
The typical specifications of the Tsuchime (hammertone) panels for this project are 0.6mm thick copper sheets, 2000mm (L) and 1000mm (W), hammered then waxed to achieve a red-tinted polished finish.
Two bespoke Tsuchime (hammertone) finishes were developed and used for this project, the variation stemming from the differences in the Tsuchime diameters, 50mm and 15mm. Interestingly, the diameters of the newly developed Tsuchime tools are, in fact, 80mm and 30mm respectively.
Tsuchime (hammertone) is unique in its ability to accommodate various designs; the shapes, sizes and even the depth of each pattern provide variation. These textures are controlled by the tool, its shapes, as well as the craftsman’s workspace and his strength – thus their capability and quality control know-how translate to the quality of the finished patterns.
Based on our involvement in various Tsuchime projects, Kikukawa has developed its own expertise to control the Tsuchime texture. With this, Kikukawa was able to respond to this project’s requirements – of hand-crafted physique, one of beauty, warmth, and imperfection.
The 2100 pieces of cherry blossoms consist of 21 designs, varying in design and sizes.
The details of the flower shaped pieces, and the panels were designed with considerations to the installation on-site. Given the butt-joint details, the precision of the installation was key in actualising the design. Kikukawa communicated the specifications and installation methodology with drawings to ensure a smooth installation process.
As explained, Kikukawa provides various Tsuchime finished products from small monuments to large facades. These patterns can be viewed from our finish sample books or by inquiry.
For more information on Tsuchime (hammered) finish, click here
May 22, 2019
May 22, 2019 – Kikukawa released the following newsletter in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has fabricated a chair entitled ‘Shades of Michelangelo (MIC)’ in collaboration with designer, Toshiki Omatsu. The back plate of the chair is formed with incremental forming, which is typically reserved for architectural facades.
To find out more about incremental forming, click here
Click here for the newsletter in PDF (Japanese):
2019.05.22 Kikukawa News Letter (Kuwasawa Design School, Incremental Forming Chair)
May 14, 2019
Kikukawa is proposing expanded metal as a design facade.
Expanded metal is mesh-like sheet metal with wide strands, providing a balanced level of sunlight, visibility, privacy, and openness. The three-dimensional nature of the expanded metal provides depth, providing a varying impression depending on the light condition or angle.
As part of its line of expanded metal, Kikukawa standardized four sets of expanded metal patterns, sheet sizes and installation details as KCT01. This semi-bespoke line of expanded metal is packed with Kikukawa’s expertise in bespoke metalwork, providing a shorter lead-time and lower fabrication costs than those made-to-order.
The following examples are projects that utilized Kikukawa’s KCT01: expanded metal.
The first is a hairdresser in Hiroshima, that underwent a facade renovation. The selected expanded metal has a mesh pitch of 203mm, strands of 30mm (product number: CTKEX-D203), and painted white. The 54 panels have standard widths of 985mm, the D-shaped openings are vertically oblong.
KCT01 is equipped with an easy-to-install fastening system, developed and provided by Kikukawa. Thus the hairdresser was able to continue their typical store hours while undergoing the renovation.
The second project is an electronics factory in Fukushima.
The selected expanded metal has a mesh pitch of 99mm, strands of 22mm (product number: CTKEX-D99), and painted white. The standard sizes of the 49 expanded metal panels are 990mm(W) by 3000mm(H) with D-shaped openings oblong, installed at a predefined pitch of 1830mm.
Kikukawa has the ability to provide and work expanded metal into a design facade.
Unlike Kikukawa’s typical bespoke metalworking products, KCT01 is sold on a metal-sheet basis with fastening systems. The semi-bespoke line of perforated expanded metals, Rattan, are also available upon request.
Please consult us when considering expanded metal in architectural projects.
April 23, 2019
At Kikukawa, we combine cutting edge technology and craftsmanship to implement designs. In addition to this, we explore new technologies and methodologies and review our knowhow to achieve and refine our fabrication.
As an example of this, we introduce the door of Kikukawa’s new sample room that opened on April 10th, 2019.
The 2063mm high and 1608mm wide glass double swing door has a 1400mm diameter bowl-shaped sulfurized* aluminium attached to its surface. The 450mm long handles are fabricated by combining, twisting and bending 20 bronze round bars.
There are 235 pieces of decorative copper round bars embedded to the wooden frame, each 10mm in diameter, its number increasing from the top right to the bottom left.
By implementing the bowl-shape with aluminium, the doors are lighter than if it was made of bronze, and is easier to open/close. The fabrication was as follows. The bowl-shape is shaped with incremental forming, a dieless forming technology, and cut in half with the 3D laser cutting machine. The use of incremental forming reduced the fabrication lead-time in comparison to the conventional fabrication methodology. And by using 3D laser cutting machine, the two aluminium pieces fit perfectly together.
Once formed, the aluminium was sulfurized. Typically, sulfurization is only available for bronze alloys, however, Kikukawa developed a new methodology to allow this for aluminium.
As for the handles, they were twisted then bent to achieve its unique aesthetics. The difficulties with this process are in fixing the location of the twist and achieving it equally for all round bars.
As described above, Kikukawa’s metalwork develops and explores new technology and methodologies in its fabrication works.
To visit Studio K+, contact us here
For more information on Studio K+, click here
For more information on incremental forming, click here
For more information on sulfurization, click here
*Sulfurization is a finishing technique that recreates the rich brown hues of patinated bronze that would otherwise take decades to form.
April 10, 2019
April 3, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced the opening of its first sample showroom, Studio K+, in its factory in Chiba. The showroom allows guests to observe, touch and experience Kikukawa’s metalworking technologies, such as its Tsuchime finish.
Click here for the press release in PDF (Japanese):
2019.04.10 Kikukawa News Release (Studio K+ Opens)
April 9, 2019
For high-quality mirror-polished stainless steel panels, the requirements include a flawless reflection. This requirement is true regardless of the shape and size of the product, and Kikukawa has the capabilities to answer to this request.
The following pictures show the stainless steel border panels at the staircase of The Ginza Cosmetics Ginza, a skincare brand store that opened in Ginza in November of 2018. (The Ginza is offered by a group company of Shiseido.)
The panels are double-curved, running upwards along the staircase. Regardless of this complex shape, Kikukawa’s mirror-polished stainless steel panels are high in quality.
The mirror-polished ribbon panels are roughly 420mm high, with cut-panel details. The 3mm edges were polished carefully as well. Each floor consists of 3~4 butt-joint panels, each panel installed next to another. The joints are hard to distinguish due to the precision of the installation works.
For the event space in B2 floor of The Ginza Cosmetics Ginza, Kikukawa also fabricated the mirror-polished ceiling panels. The 3068mm by 5441mm ceiling panels with 3.0mm cut panel details are honeycombed at the back to ensure flatness. The three central mirror-polished panels, 1381mm by 1768mm are also butt-joint.
Kikukawa has the QC know-how to ensure the high-quality of our mirror-polished stainless steel panels. This is true for flat panels as well as those with complex designs.
March 26, 2019
At Kikukawa, we are committed to implementing the design of every project. This is true for our bespoke metalwork and metal construction services, as well as in collaboration works with other materials and other fabricators. By providing assistance in such a way that fully utilizes the features of each product and design, we ensure the success of each project.
The following pictures are from the 80th-anniversary project of Haseko Corporation*, “Haseko Technical Center”**. Kikukawa provided the steel structural staircase, and the outdoor handrails and strings. The center is comprised of three buildings; an administration building, a housing performance test building, and a multi-purpose test building. The administration building houses the Haseko Condominium Museum on its second floor.
The L-shaped steel structural staircase is situated in the main entrance area of Haseko Condominium Museum.
The administration building is transparent and spacious, wrapped in a glass facade. Adding to this physique is the steel staircase, the footboard wrapped in wood and the glass balustrades supported by the DPG system.
The staircase is 7730mm long, and 4730mm wide, and 5300mm high. The L shaped stairs are supported by the two columns below the staircase landing and the two square pipe strings that stretch from the columns to the first and second floor. Although the strings were originally designed as one, the resulting design became two with consideration to the tremors. With consideration to the design, the two strings are placed in equal distance, and the columns are placed diagonally below the landing.
The outdoor handrails and string are at the border of the wooden path that connects the three buildings within Haseko Technical Center and ensuring the biotope*** outside the wooden path. The handrails are fabricated in stainless steel with consideration to the exterior conditions.
The handrails are in total 72437mm long. The covers are made from 1.5mm HL finished stainless steel and the supporting plates are plated to enhance the stainless properties of the material.
As shown, Kikukawa provides products that fully implement the design intent, regardless of the material.
*For more information on Haseko Corporation, click here
https://www.haseko.co.jp/hc/english/profile.html
**For more information on Haseko Technical Center, click here (Japanese link)
https://www.haseko.co.jp/htc/
***Biotope: a region secured to support the habitat of a particular ecological community.
March 12, 2019
At Kikukawa, we provide solutions for exterior constructions (that look like signage) and monument works.
The following pictures are the exterior of a kindergarten, coloured by the 51 Hiragana (Japanese) letters. Each letter is roughly 400mm by 400mm, laser cut from a 3mm thick stainless steel sheet. The letters are composed of a base and the coloured front, with the connecting joints ranging in height from 50mm, 100mm or 200mm. Placed strategically, the letters signify the branches of a tree.
The exterior letter, its shadow, and the base create a beautifully designed contrast.
The joints needed to be finished carefully for aesthetics, while also having the necessary strength. The panels are designed so that the assembled signage would fulfill both requirements.
The letters are made of 47 unique colours. The panels were quality controlled within the Kikukawa factory from the design stage to the final installation, thus fulfilling the requirements of our clients and exceeding their expectations.
For any metal constructions, or metal designs and metallic expressions, please consult us.
*Kikukawa has built a new facility that allows us to prepare the surface of the aluminium sheets prior to the paint coating process in January 2019.
February 27, 2019
February 27, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced the launch of the second Kikukawa City Texture (KCT) series, a line of semi-bespoke metal architectural products. Added to the series is the round column cover.
Click here to view the round column cover sample book (bottom of the page):
Kikukawa’s Finish Samples – Stainless Steel
Click here for the press release in PDF (Japanese):
2019.2.27 Kikukawa News Release (KCT02 Round column cover)
Click here for the press release on KCT Series in PDF (Japanese):
2018.05.15 Kikukawa News Release KCT Series
February 26, 2019
At Kikukawa, we fabricate jointless extra large dual curved monument from design to installation, using our expertise in metalwork.
Artworks and monuments tend to be required in small lots in a unique, complex shape. In realising these designed shapes, metals tend to be chosen for its high designability and workability. Especially artworks that are extra-large or complex in shape, or those that would be placed outside or in coastal areas, considerations to installation and fabrication methodology are required from the design stage.
Kikukawa has been providing solutions to such projects as metal construction experts. Spheres and double curved shapes, such as triple helixes, require highly-specialised metalworking know-how and technologies.
The following is such an example, a parabolic arch made with 4.5mm thick steel sheets with max. width at 852mm. The arch itself is 7355mm high and the food-width is 1783mm wide. In addition to the curve as an arch, the steel plate curves inwards, much like the shape of a tong.
Due to its size, this monument was fabricated from 5 pieces. Each piece was bent and curved before it was welded together. The monument was finished and shipped as one-piece to maintain and ensure its quality.
The difficulties in fabricating these extra large double curved monuments are in fabrication, and in installation. At Kikukawa, the fabrication difficulties were overcome by combining expert craftsmanship and precise bending technologies. For shipping and installation, our experts planned carefully in advance for a smooth delivery.
After welding the pieces, they are carefully re-finished, then prepared to prevent oxidation. The joint areas are indistinguishable on the final product that was painted in metallic grey.
The monument is inspected and tested within our factory before shipment. In doing so, we refine our installation methodologies, leading to a smoother installation process onsite.
As shown above, Kikukawa provides design to installation services of extra large double curved monuments or artworks. By selecting the most suitable fabrication and installation methodology based on product shape, material or installation areas, we ensure the delivery of high-quality metal works.
February 12, 2019
“Oxidized paint” is a finish that results from the combination of Kikukawa’s custom painting and colouring technology. As a finish that replicates the oxidized rustic physique of steel, without the actual rust or its peeling, this look is sought by designers that wish to utilize the aesthetics of rust without its nuisance.
Steel finish samples including Irus (oxidized paint) are available here
The following panels are from a project with 3mm aluminium exterior* cut-panel details with urethane “oxidized” paint coat. The gently curved panels are finished with red-tinted rustic paint.
The larger panels, gently curved and with cut-panel details, are roughly 600mm to 800mm wide, and 1600mm high. The smaller panels, also with cut-panel details, are roughly 260mm wide and 3610mm high. As the above picture shows, the square 600mm curved access panels are in alignment with the other panels.
The oxidized paint coat is a hand-painted finish. While each panel is finished one-by-one by our craftsmen, the colours are controlled to ensure consistency.
For this project, the aluminium surface was prepared in another factory. With the establishment of Kikukawa’s new aluminium surface-preparation facility this January, these custom painted finishes can be fabricated and quality controlled at Kikukawa.
As a bespoke architectural metalworker, Kikukawa will consult and provide solutions to projects with custom coating requirements. Please contact us for details or inquiries.
For more information on Kikukawa’s new facility, click here
*Irus was invented as a finish for interior use. For exterior use, please consult us prior to your selection.
January 29, 2019
January 29, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced that its original “invisible access panel system” is now available for purchase.
To view the brochure, click here:
https://www.kikukawa.com/en/materials-and-brochures/
Click here for the press release in PDF (Japanese):
2019.1.29 Kikukawa News Release(Invisible-access-panel)
January 29, 2019
As a bespoke architectural metalworker, Kikukawa’s main specialty has been in large interior and exterior constructions. As exemplified by the establishment of the interior division earlier this month, Kikukawa is also an expert in small-scale or smaller sized products such as the following copper hood.
The pictures below show the fabrication process. Ultimately meant for a high-end restaurant in Ginza, this space houses counter seats which face the kitchen where the food is served directly from the chef.
Kikukawa’s handcrafted copper hood, a piece that balances both aesthetics and functionality, lies in the centre of this kitchen, contributing to a calming and classic ambiance of the Japanese-style space.
This hood is shaped like a half cylindrical tube, cut diagonally then welded with a lid at the top. It is roughly 630mm in diameter and its height ranges from 245mm to 360mm.
The selected finish is PHL and clear coating. This unique texture stems from the PHL finish which softens the natural red glisten of the copper, and the clear coating which emphasizes its shine. The clear coating allows the natural tint of the copper to be enjoyed for a longer period.
With the fabrication of copper products that requires both aesthetic and functionality, the most difficult process is considered to be welding. As copper alloys have a higher thermal conductivity in comparison to other metals such as steel, problems such as welding strength, distortion or discolouration occurs more easily.
At Kikukawa, we overcome these potential issues by applying high-quality bending and cutting, as well as careful welding by expert craftsman that fully utilizes their expertise.
This project is an example of the OSS (One Stop Solution) system, which means that Kikukawa was responsible for the process from fabrication to installation.
With interior constructions, attention to details influences the product’s quality, in aesthetics and functionality, especially for appliance-related products. Kikukawa will continue to contribute to interior constructions by using its know-how established from bespoke metal constructions.
January 25, 2019
Every year, KIKUKAWA fabricates pentagon shields, “Hounou-date”, to pray for safety and prosperity in the upcoming year and to exemplify our New Year’s resolution. On the shield, there are three objects that denote the Japanese Kanji character for water, 水. Each object symbolizes our prayer: the “sword” to ward off evil, the “sickle” to bring a good harvest, and the “key” for prosperity.
The root of this tradition lies with Japanese blacksmiths fabricating “Hounou-date” as a talisman against fire. By dedicating a shield with a water kanji at the beginning of the year, the craftsmen cleansed their workplace and prayed for another safe year.
KIKUKAWA still honours this practice as a sign of respect for the artisan handiwork. To hone and pass on our craftsmanship, the fabrication of the shield is carried out by younger members and Vietnamese trainees.
As per tradition, three key materials and finishes were chosen.
2019 Kikukawa “Hounou-date”
The silky blast finish, used for the water kanji, is a series of KIKUKAWA’s proprietary finish that has been selected for a number of projects including Tokyo Station and the Japanese Sword Museum.
These shields are on display at various places within our Shiroi factory.
January 24, 2019
January 24, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced that it is adopting a telecommute system to allow employees to work-from-home when necessary.
Click here for the press release in PDF (Japanese):
2019.1.24 Kikukawa News Release(telecommute system)
January 16, 2019
January 16, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced that a new division was established for interior constructions.
Click here for the press release in PDF (Japanese):
2019.1.16 Kikukawa News Release(OSS-system)
January 8, 2019
While roller shutters and overhead doors are common options for large openings, many solutions have limitations such as loud operating noises or necessity for large retracting space.
Kikukawa’s Shumon, a super large folding door system, is favored for its functionality and aesthetics, particularly its smooth, quiet and quick operation. This is a product fabricated and sold by Kikukawa in partnership with Gartner.
The following pictures are from Narahara branch of Hachioji fire department in Tokyo, a second fire department branch to install the automatic type of Shumon. The opening is 15m (W) x 4m (H), separated by two sets of two doors that open at the center to both sides.
For this branch, the Shumon doors are glass types painted white. The operating noise is roughly 40-decibel*, and the opening time is about 11 seconds. The glass doors allow visibility and provide a sense of security within the neighborhood.
*Decibel(dB): a unit to measure the intensity of a sound. Typically, “quiet” household electronics operate under 50dB; 40dB is considered to be equivalent to the noise level within a library.
Other features of Shumon include the following.
-The electric drive unit fits in the 450mm(H) access panels at the top, removing the necessity for additional ceiling constructions.
-Touch sensors ensure safe operation by detecting any obstacles when closing and stopping the operation automatically.
-During an emergency such as black-outs or malfunction, the doors can be switched from electric to manual operation with a single touch.
-The doors can be opened with ease by hand.
The hinges supporting these super large doors are maintenance-free (conditions: 10 years, or 200,000 overhead opening operations). The custom gaskets improve airtightness, which contributes to quieter operations and reduces the energy necessary for operation.
The super large folding door shumon is available in various colours, and types such as glass or windows. Projects that used Shumon include fire departments, schools, factories and other public facilities (including the Japan Racing Association).
For large opening door solutions, please contact us.
For more information on SLF door, Shumon (Japanese product brochure)
January 7, 2019
January 7, 2019 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has conducted a start-up ceremony to commemorate the establishment of its new aluminium surface-preparation facility.
Click here for the press release in PDF (Japanese):
2019.01.07 Kikukawa News Release (paint facility expansion)
December 25, 2018
For a sharp edge or joint, some projects require the section of sheet metals to be tapered. Typically, this tapering process is done with a milling machine or by hand.
At Kikukawa, we offer taper cutting sheet metals with the single mode fiber laser cutting machine, in addition to other metalworking methodologies. The benefit of using the fiber laser cutting machine is that it can move in three-dimensional axis (x, y, z), with high precision. This means that the lead-time is shorter, and that taper cutting curves are possible.
Applicable tapering angles range from 36-degrees to 90-degrees.
Restrictions on the curvature or applicable metal sheet sizes vary depending on the material and the product shape.
Kikukawa is able to respond to various metal cutting needs; from taper cutting to other cutting needs – Kikukawa actualises various architectural products with shearing, milling, turret punch, laser cutting machines and at times with expert handicraft. Please do not hesitate to contact us for consultations or fabrication feasibility.
Click here for more information on our fiber laser cutting machine
December 20, 2018
Listing updated or added contents during the year 2018.
27 Dec. 2018 Technology: Designing Details
13 Dec. 2018 Project Gallery: The American School in Japan
7 Dec. 2018 Project Gallery: OVOL Nihonbashi Building
12 Nov. 2018 Project Gallery: Aga Khan Centre
12 Nov. 2018 Project Gallery: Avex Building
1 Oct. 2018 Technology: Silky Blast
21 Aug. 2018 New Content: Aluminium Finish Sample Book
13 Jul. 2018 Technology: Expanded Metal Louvres
27 Jun. 2018 Project Gallery: Kesennuma Library, Kesennuma Children’s Centre
27 Jun. 2018 Project Gallery: Avex Reception Counter
26 Jun. 2018 Technology: Fibre Laser Welding
20 Jun. 2018 Project Gallery: SHISEIDO THE STORE
7 Jun. 2018 Project Gallery: Tokyo Metropolitan Teien Art Museum
18 May. 2018 Project Gallery: Meguro Central Square
15 May. 2018 Project Gallery: Tokyo Midtown Hibiya
7 May. 2018 Technology: Perforating Technology
23 Apr. 2018 SSL Certified
27 Mar. 2018 Technology: 3D Processing Technology
9 Mar. 2018 Technology: Sulfurization
19 Feb. 2018 Project Gallery: The Japanese Sword Museum
13 Feb. 2018 Project Gallery: Bloomberg London Headquarters
13 Feb. 2018 Project Gallery: Bloomberg London, Exterior Fin
13 Feb. 2018 Project Gallery: Bloomberg London, Hypotrochoid Ramp
13 Feb. 2018 Project Gallery: Bloomberg London, Arcade
12 Jan. 2018 Technology: Friction Stir Welding (FSW)
December 11, 2018
Product sizes are usually limited by the market available metal sheet sizes. However, by utilizing Kikukawa’s various welding technologies (such as FSW and laser welding), Kikukawa is able to fabricate extremely wide or long panels. Kikukawa’s new limitations are transportation, lifting load, and installation conditions.
As Kikukawa’s system relies on the combination of factory welding, and on-site welding, Kikukawa is able to fabricate and install extremely large (ultra-sized) panels. This fabrication system is achievable by considering and reflecting the following specifications to the design drawings; from the selection of the thickness of the material to the interlaminar distortion level, and the calculation of thermal expansion upon welding, to the transportation and installation sequence.
The exterior of the buildings in the courtyard, library and multi-purpose room of this high school reflects the designer intent to fabricate each face of the building in a one-panel unit.
The panels are made of 12mm thick steel sheets, hot-dip galvanized then painted with fluororesin coating. (Different paint was used for on-site paint coating.) Roughly 400 square-meters of exterior panels consist of 15 panels, with the maximum size being 18m wide and 4m high.
To fabricate these ultra-sized panels, 9 shop-welding and 14 on-site welding were conducted. Typically, distortions from the welding do not allow for on-site welding for facade panels. However, Kikukawa calculated these risks and implemented strongback frames, as well as careful considerations in the welding procedure to minimize distortion.
Demands for jointless products are increasing, and to respond to these needs, Kikukawa will continue to challenge the limitations of extremely wide or long panels.
For more information on FSW, one of Kikukawa’s welding technology, click here
For more information on extremely wide or long panels, click here
December 4, 2018
December 4, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, announced that the renovation for its employee residence, Alvis Kikukawa, was completed on November 10th, 2018. This residence will be occupied by Vietnamese trainees as well as employees to foster and improve employee engagement and satisfaction.
Click here for the press release in PDF (Japanese):
2018.12.04 Kikukawa News Release(ALVIS-KIKUKAWA)
November 27, 2018
Amongst the various construction materials, metal is considered as most flexible and workable. To maximize and translate these benefits into architectural metalwork, one of the necessary expertise is in design. Metal construction detail designers are required to have extensive knowledge; from the various building parts to the details of each, as well as the characteristics of each metal.
In addition to the expertise, Kikukawa’s design team is strengthening its 3D design capabilities and accommodations.
This arch is an example of such a case. Kikukawa contributed to this project, where various architects and contractors and fabricators communicated and adjusted design, fabrication, and installation based on a single 3D model. The crafted arch showcases Kikukawa’s metal-craft and our capabilities in accommodating the everchanging needs towards BIM.
The parabolic arch is made of 4.5mm thick steel.
The 1783mm wide and 7355mm tall arch draws a double-curve; narrowing towards the top and the edges of the panel curling inwards.
The 3D design of the steel construction is carried out on 3D CAD, based on Kikukawa’s expertise in metal craft. This expertise, for example, is the expansion or the distortion of the metal sheets during metalcraft. To draw designs with considerations to spring-back or minimal expansions of the metal sheets during manufacture, any issue encountered onsite is communicated and shared to the design team.
By repeating this process and accumulating hands-on expertise, Kikukawa has been building its 3D design expertise and know-how.
Behind Kikukawa strengthening its capabilities in 3D design is the spread of BIM, evident in the growing number of cases requiring 3D data and design accommodations.
The benefits of utilizing 3D data include the reduction of lead time for drawing and a smooth installation, as verified in this steel arch case.
Kikukawa will continue to build its expertise in 3D design through metalcraft.
Please contact us for more information on design consultations and design accommodations.
*Click here to learn more about Kikukawa’s 3D processing technology
November 20, 2018
November 19, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced that their company president will be lecturing at a seminar conducted by Chiba Industry Advancement Center. The lecture will take place on November 27th, 2018.
Click here for the press release in PDF (Japanese):
2018.11.20 Kikukawa News Release (President Lecture)
November 13, 2018
Zinc phosphate coated steel elevates the natural crystalline aesthetics of hot-dipped galvanized steel for decorative use. It is recently attracting attention for its natural, luxurious, stately ambiance and gray tones that settle over time – an effect that cannot be actualised with paint coatings.
The resulting colours and patterns of the zinc phosphate coating are highly dependant on conditions such as material composition or the thickness of the material, making the process an art as much as it is science. However, KIKUKAWA has an established quality control to ensure a level of consistency in the finish.
An example of a renovation construction featured today is a facade with hot-dipped galvanized and zinc phosphate coated steel panels. The steel panels were treated with hot-dip galvanization and dark zinc phosphate coating (Phozinc: PZ-03), to be used as the facade of a gallery.
While the facade was previously a shop window, the renovated facade is lined with cut-edge 2.3mm thick steel panels. The panels contribute to the establishment of a composed ambiance.
The 48 panels form a 15m long wall, with the standard panel size being 283mm (W) x 3220mm (H).
The automatic entrance flush doors are lined with similarly dark phosphate coated panels of 2100mm (W) x 2750mm (H).
By lining the panels, the consistency of colour is inspected. These panels are installed strategically on-site to ensure a natural colour gradation.
Zinc phosphate coatings have limitations such as size, shape, and difficulties in controlling the finishing colours. However, Kikukawa’s Phozinc is quality controlled with our metal expertise and technology to respond to the project requirements.
For more information on zinc phosphate coating, click here
For more information on Kikukawa’s renovation constructions, click here
November 7, 2018
November 7, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, celebrates its 85th anniversary in business on November 1st, 2018. Looking ahead, Kikukawa plans to expand and diversify its business to adapt to the changing market.
Click here for the press release in PDF (Japanese):
2018.09.04 Kikukawa News Release(85 anniversary)
October 30, 2018
An article on Kikukawa was featured on the November 2018 cosy design special of ‘MONOCLE’, an English magazine.
The global magazine covers areas including global affairs, business, culture, and design – and sells more than 84,000copies per issue.
To read the article, click here
To learn more about ‘MONOCLE’, click here
*This article was also featured on ‘Nikkei Asian Review’ on Oct 29th.
To learn more about ‘Nikkei Asian Review’, click here
October 23, 2018
Kikukawa’ projects were featured on the “Stainless Steel in Architectural Applications”, an annual publication featuring various stainless steel projects over the world by International Stainless Steel Forum* (ISSF).
Download link below (PDF 41.6MB)
http://www.worldstainless.org/Files/issf/non-image-files/PDF/ISSF_Stainless_Steel_in_Architectural_Applications_Volume_5.pdf
Kikukawa is featured as a manufacturer in four projects.
-p.26 Tokyo Midtown Hibiya
-p.44 The Japanese Sword Museum
-p.70 Ventilation Tower of Tokyo Station
-p.110 Tokyu Plaza Omotesando Harajuku
Click the following links for more information on Kikukawa’s involvement in these projects.
– Tokyo Midtown Hibiya
– The Japanese Sword Museum
– Ventilation Tower of Tokyo Station
– Tokyu Plaza Omotesando Harajuku
*ISSF (International Stainless Steel Forum):
A non-profit research and development organisation founded in 1996 to serve as the focal point for the international stainless steel industry. Members include producers of stainless steel worldwide. From Japan, members include major stainless steel manufacturers and Japan Stainless Steel Association (JSSA).
October 22, 2018
At Kikukawa, we provide bespoke facades as well as structurally artistic projects and interiors.
The interior spiral staircase introduced today is an example of such a project. The minimalistic and iconic staircase connects the three floors, winding around a transparent circular lift shaft. To implement this design, the spiral staircase was designed, calculated and fabricated with minimal supporting balusters or supporting braces.
This project, ‘Japan House London’ *, opened in June of 2018, taking up a Grade II Heritage Listed Art Deco building that was once a department store on Kensington High Street. The interior was remodeled based on the design concept developed by Masamichi Katayama, a renowned interior designer and founder of Wonderwall.
In implementing a space with ‘Japan’s aesthetics and the mindset of its people in mind’, the design and the functionality of the central spiral staircase was key. To transform the steel frame of the spiral staircase into structural art, various considerations were necessary; from the selection of the material to the actual fabrication, and the calculation of the structural plan by 3D analysis model in collaboration with Ney & Partners.
The dimensions of the spiral staircase are as follows: the outer radius is 3400mm, the entire spiral staircase is 9420mm high, and the staircase width is 1322mm.
The curving stringer is formed with a 40mm thick high-performance steel. The ceiling is fabricated with 6mm thick steel sheets, cut into triangles and placed alternatively to form a simple curved geometry. The handrails are formed with φ19mm round-bar balusters and φ42.7mm round-pipes.
One of the defining features of this handrail is in the structure of the handrails. Typically, this detail is welded, however, the φ19mm balusters are inserted into the three-dimensionally curved 40mm thick stringers. The process of drilling circular holes into a curving stringer was challenging. Yet it was precisely this detail that enabled the minimalist form of the handrails.
As a project in the UK, various considerations specific to overseas projects were necessary, such as shipping and crating plans. By collaborating with the directors, general contractor, and installers, Kikukawa overcame various difficulties for this project.
Interior architecture and interiors must balance art and functionality to enhance and achieve a space for the people who use them. At Kikukawa, we accommodate and implement interiors by applying our expertise and know-how built through bespoke metal architectural constructions in Japan and overseas.
For more information on Japan House London, click here
For more information on Masamichi Katayama, click here
*Japan House – a project supported by the Ministry of Foreign Affairs of Japan in hopes to nurture deeper understanding and appreciation of Japan by introducing its culture, and its charms.
October 12, 2018
The multi-award winning European headquarters for Bloomberg in London designed by Foster + Partners has won this year’s RIBA Stirling Prize, the UK’s most prestigious architecture award.
The ‘astounding’ and ‘boundary-pushing’ project was unanimously chosen by the RIBA judges for its achievement in the level of research, innovation, experimentation during the design process.
The project occupies 102,190㎡ of land, designed as two-buildings connected by a bridge over a re-established ancient Roman arcade. The exterior features hand-crafted sandstone, and over 97 types of bronze window fins. A few of these fins incorporate built-in air vents. The building houses a distinctive 210m long bronze ramp, designed as a place of impromptu conversation, meeting, and connection.
Kikukawa, as metal-craftsmen and engineers, worked closely with the project’s Stirling Prize-winning architect Foster + Partners, contractors, and other suppliers to ensure the vision, the world’s most sustainable office, was delivered. As the bronze supplier, Kikukawa provided the FURUMI (sulfurized) bronze panels, from the fins to the ramp, each displaying our metal craftsmanship and technology.
Within Kikukawa, our 3D designing technology, our cutting-edge welding technology (FSW and fiber laser welding), and the artisanal FURUMI (sulfurized) finish played a fundamental role in the realisation of the project.
The project and the collaboration ‘have not just raised the bar for office design and city planning, but smashed the ceiling’ said RIBA president Ben Derbyshire.
It is a privilege for Kikukawa to have contributed to this monumental project. Congratulations to Foster + Partners for this great achievement and your continued success.
For more information on RIBA Stirling Prize, click here
For more information on Foster + Partners, click here
For more information on Bloomberg London, click here
For more information on Kikukawa’s involvement, click here
For more information on Kikukawa’s technology, click here
Click here for the press release in PDF (Japanese):
2018.10.24 Kikukawa News Release Bloomberg London wins 2018 RIBA Stirling Prize
October 11, 2018
An article on Kikukawa was featured on the Country Business Report section of ‘South China Morning Post’, a daily English newspaper published in Hong Kong.
The article focuses on Kikukawa’s history, principles and its evolving business structure.
The South China Morning Post published its first paper in 1903. Today, the journal’s area of circulation includes Hong Kong, China, Japan, South Korea, Singapore, Malaysia, Taiwan, Indonesia, Philippines, and Thailand.
October 9, 2018
Kikukawa has the expertise to provide extra large high-quality mirror polished stainless steel panels. The following pictures are from the quality inspection conducted on a mirror-polished panel over 1500mm(W) x 5000mm(L), its high-quality and flatness apparent from the beautiful reflection.
Typically, extra-wide or extra-large mirror polished stainless steel panels are provided in thicker sheets with cut-edge panel details, to ensure the high-quality of the finish. The difficulty comes from the quality of the metal sheet material, as sheets over 2mm tend to have pores, and this tendency increases with larger sized sheets. Additionally, larger panels are proportionally heavier, requiring more time, people and care during handling.
At Kikukawa, these difficulties have been addressed, overcome and accumulated as know-how. We share our quality control expertise with the material providers and the polishers to ensure the high-quality of the panels.
Kikukawa was entrusted for our commitment to high-quality and to the design requirements to fabricate the bespoke mirror-polished panels for an overseas project in Lithuania. The mirror-polished panels will form the exterior walls and the roof.
Exterior wall panels – 5mm thick sheets of SUS304, the largest being 1810mm (W) x 6440mm(L) in size will be lined vertically to form a 13m high four-sided exterior wall.
Roof panels – 5mm thick sheets of SUS304, the largest being 1750mm(W) x 7990mm(L) in size. The 14 panels will form a 240㎡ roof.
Please note that projects with stainless steel panels over the market-available metal sheet sizes require considerations such as procurement period and minimum order quantity. Please consult us for more information.
For more information on Kikukawa’s projects with the mirror-polished finish, click here
September 25, 2018
While Kikukawa specializes in bespoke metal constructions, we also accommodate artistic monuments or interior construction for exhibits and galleries. Today, we introduce such example – an exhibit hosted by Japan House*, Prototyping in Tokyo.
This exhibit showcases Professor Shunji Yamanaka’s design and engineering works through his development of cutting-edge prototypes.
The design concept of the exhibition space is “picture scrolls.”
To contextualize this, designer Motosuke Mandai envisioned a space filled with floating picture scrolls.
The key to implementing this design was in the realisation of picture scrolls. The “picture scrolls” are fabricated with paint coated steel sheets and supported by wires and legs in various places.
The 3.2mm steel metal sheets, painted white with acrylic resin, are supported by 8mm diameter stainless steel rods and 19mm diameter silver painted round pipes.
This exhibit will tour Japan House galleries worldwide, from Sao Paulo to Los Angeles to London.
At Kikukawa, we accommodate interiors, interior construction, and decorative hardware by applying our expertise and know-how built through bespoke metal architectural constructions.
*Japan House – a project supported by the Ministry of Foreign Affairs of Japan in hopes to nurture deeper understanding and appreciation of Japan by introducing Japan, its culture, and its charms.
September 19, 2018
September 19, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, was selected as a government subsidized company by the Sustainable open Innovation Initiative (SSI), to continue its efforts in replacing the AC system to high-efficiency models, to promote sustainability, to improve the work environment and for higher productivity.
For more information on the Ministry of Economy, Trade and Industry funded subsidy implemented by SSI, click here (Japanese website):
https://sii.or.jp/
Click here for the press release in PDF (Japanese):
2018.09.19 Kikukawa News Release (High efficiency AC with gvt funding)
September 11, 2018
When installing variously shaped panels with varying angles, the quality of the product and installation precision is key to the project’s success.
Kikukawa’s “flexible panel system” is a system of a backing-frames designed for smooth installation of panels with different shapes at varying angles. The differences incurred during installation on-site can be absorbed with this system of pipe cradlings and flexible brackets.
The “flexible panel system” was developed for a project – known as the kaleidoscope – to install the triangular mirror polished stainless steel panels of varying shapes, sizes and angles.
The tips, the joints and the angles are installed with high precision.
As planned and as drawn, the high-quality mirror polished stainless steel panels were installed successfully.
This kaleidoscopic project is “Tokyu Plaza, Omotesando Harajuku”.
For more information, click here
August 29, 2018
At Kikukawa, we are supporting the implementation of BIM* by accommodating 3D design data from consultation, designing to fabrication.
Here, we introduce such an example, an interior ramp that was built using 3D data. The largest panel of this ramp is up to 2600mm(W) and 2731mm (H). Given the hypotrochoid shape of the ramp and the size of the panel, the details of the panels needed to be designed three-dimensionally.
From the receipt of the design data to the approval of the drawings, all communications with the client were done using 3D data.
Internally, the 3D data was used to consider design details, to draw production designs, to assemble the panel and to plan packing.
The benefits of BIM is recognized worldwide. Within Japan, the adoption of BIM is becoming more common to accommodate complex designs and to increase efficiency.
Since the introduction of a 3D-CAD dedicated machine in 1990, Kikukawa has worked to build our expertise in 3D design. This shaped Kikukawa to be an expert in 3D-CAD designs and BIM accommodations within the metal-crafting industry.
Today, we accommodate the following application software.
3D-CAD (Computer-Aided Design)
-Rhinoceros
-Inventor
-Vectorworks
-SolidWorks
BIM (Building Information Modeling)
-Autodesk Revit
Please contact us for more information, or for inquiries on the accommodation of BIM designs.
Click here to learn more about the spiral staircase of Bloomberg London
Click here to learn more about Kikukawa’s 3D processing technology
*BIM (Building Information Modeling): digital representation of a building, used to manage the project throughout the building’s life cycle.
August 28, 2018
August 28, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, was selected as a government subsidized company by the Small and Medium Enterprise Agency to continue its research on FSW (Friction Stir Welding) of dissimilar metals, aluminium and magnesium.
For more information on FSW (Friction Stir Welding):
https://www.kikukawa.com/en/technology/friction-stir-welding/
Click here for the press release in PDF (Japanese):
2018.08.28 Kikukawa News Release (FSW Magnesium and Aluminium)
August 21, 2018
August 21, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has developed new finishes for its very first aluminium finish sample book. Available for purchase and review.
For more information on the aluminium finish sample book:
https://www.kikukawa.com/en/materials-and-brochures/
Click here for the press release in PDF (Japanese):
2018.08.21 Kikukawa News Release Aluminium Finish Sample Book
August 7, 2018
Rough-tone metal is Kikukawa’s proprietary embossing technology, which implements cast-like textures. The produced panels are low in cost, light in weight, versatile in function and provide the stately aesthetics of metal.
Kikukawa’s rough-tone metal is offered in two series: P and R. The P series is a collection of sharp embossing and deep-drawn patterns, while the R series is a collection of roll embossing patterns implemented with proprietary machinery and dies. These patterns are suitable for a variety of occasions as both interiors and exteriors.
Here, we introduce 2mm black aluminium exterior panels, decorated with rough-tone, P series, KU-P513. This abbreviation stands for 12mm wide and 74mm long oval patterns.
The embossing occurs every 86.6mm in width and 61.8mm in length. By controlling the frequency of the pattern, a horizontal pattern becomes evident.
The quality inspection extends from the size of the panel to its flatness.
Panels with horizontal patterns require high precision in installation, as the flatness of the panels are easily observable. These installed exterior panels add a decorative touch to the facade.
Rough-tone metal provides textures that are not readily available and is a unique solution to lower cost requirements.
For more information on available patterns, click here (Japanese catalog)
July 27, 2018
Twisting is a metalwork that elevates ready-made materials to implement various designs.
At Kikukawa, we are able to twist flat-bars, pipes and extruded materials of steel, stainless steel, aluminium, and bronze.
Here, we introduce two projects that employed twisted materials as its interior and exterior.
The first project, Nebuta Museum Wa Rasse, is one that used red painted twisted steel as its facade.
The 730 pieces of steel flat-bars are 9mm thick, 300mm wide and 12,000mm long. Having over 220 types of these twisting details, Kikukawa conducted numerous experiments to establish twisting and 3-dimensional metal crafting technology.
For more information on Nebuta Museum Wa Rasse, click here.
Next is a project that played with various twisting details for a decorative interior.
To the left is a checkered pattern implemented by employing twisting at different pitches. To the right, is a design that plays with alternating colour, implemented by painting one side of the metal bar.
Twisted metals are used as louvers, fences, gates, ramps, and partitions for its high versatility in design. For fabrication feasibility, more details or consultation, please do not hesitate to contact us.
Contact us here.
July 13, 2018
July 13, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has developed a new sample book featuring perforated expanded metal, as an addition to Kikukawa’s various louver options. It will become available for purchase on July 20th, 2018.
Click here for the press release in PDF (Japanese):
2018.07.13 Kikukawa News Release Development of “Rattan”, Perforated Expanded Metal
July 12, 2018
Kikukawa’s strength lies in bespoke metalwork, however, it is also able to produce high-quality products with ready-made materials. The added value from metalworking, finishing, installing, and the combination of bespoke products lead to an implementation of designs at a higher level.
Here, we introduce aluminium ready-made spandrels and bespoke aluminium panels to realize an exterior adorned with frames. As a renovation project, the dimensions and installation became complex, yet Kikukawa was able to implement this to realize a refined physique.
The aluminium spandrels are 23mm thick and 40mm wide. The added value of high-quality anodization, metal-craft, and installation translate to a refined facade.
The 10mm aluminium panels were double curved, welded then finished with fluorine resin coating. The joints between the spandrels and the walls are 6mm.
With a design that required precision, both ready-made spandrels and bespoke panels were metal-worked carefully by Kikukawa.
To implement various needs and designs, Kikukawa is able to combine bespoke and ready-made products, from design to installation.
June 27, 2018
Brass is a popular material for interior use, for its chic gold texture and high workability.
Kikukawa is able to weld extra-long and 3 dimensionally curved panels with minimal distortion.
Here is a perforated brass metal product over the market available material sheet size. Finished with hair-line and clear coating, a texture that fully displays the beauty of brass.
To satisfy the requirements, welded brass metal sheets with high strength, minimal distortion and minimal discolouration were necessary.
While the final product size is 2140mm (W) x 1604mm (L), the largest market available sheet is 1250mm (W) x 3050mm (L). To ensure the necessary strength for perforation with typical welding methodology (TIG welding) would have required careful welding – and the carefully TIG welded sheets would have suffered from discolouration and distortion from the heat.
Kikukawa overcame this difficulty by combining the latest welding technology and craftsmanship.
The result is a flat perforated metal sheet, over the market available sheet size, without visible welding marks.
As shown, Kikukawa combines the latest welding technology, such as laser welding, to the classics, such as TIG welding, and craftsmanship to implement various metal crafting needs.
For more information on Kikukawa’s TIG welding, click here
For more information on Kikukawa’s welding technology, click here
June 12, 2018
TIG welding is key to develop various high-quality metalworks.
Kikukawa’s expertise and craftsmanship allows the fabrication of metal products with both quality and design.
Here is a mirror polished stainless steel monument, formed by eight rings that are joint together by a belt to form a 1m spherical monument.
Rings cut from 3mm thick metal sheets are fixed together by a perpendicular ring, cut from a 6mm metal sheet.
The monument reveals a different impression depending on the angle it is seen.
Each joint has different fixing angles and conditions – and the finish must be done carefully so that the monument can be seen from any angle.
Each welding is checked carefully so that the necessary strength is achieved while no deformation or decolouration has occurred. The exterior rings are securely welded, yet the joints are hardly visible.
As shown, Kikukawa has the know-how to provide high-quality weldings. Additionally, we have the latest technology, such as FSW and fiber laser welding, to meet the necessary welding requirements.
For more information on Kikukawa’s fiber laser welding, click here
For more information on Kikukawa’s FSW (Friction Stir Welding), click here
June 6, 2018
June 6, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced that a new project team has been launched for renovation projects in Japan, in response to the expected increase in demand in such projects post 2020 Tokyo Olympics.
Click here for the press release in PDF (Japanese):
2018.06.06Kikukawa News Release Renewal(PJ3)
May 28, 2018
Kikukawa has developed a new technology to weld brass without discolouration.
Previously, Kikukawa was able to minimize discolouration by refining its welding technology, however, it was near impossible to remove it. With this new technology, we are able to fabricate over-sized brass panels or weld extrusions without discolouration.
Brass is a widely used material in architecture, as door handles, handrails, faucets, signboards and others. From the gold hue of new brass to the rich brown hues of patinated brass, the changing colour is part of the material’s appeal.
However, it has not been a common choice in larger products for various reasons.
For instance, casting, extruding or machining brass to the necessary quality meant longer fabrication lead time and higher costs.
To combat discolouration from welding brass, brazing was used for products that required less welding strength. However, brazing requires experience and the filler material lead to slight discolourations.
With the new technology developed by Kikukawa, we overcame these difficulties so that fabrications of larger products or products that hope to utilize the original texture and hues of brass are possible. Furthermore, as the material is not exposed to discolouration, finishes such as sulfurization are also possible.
For more information, testing or manufacturing feasibility, contact us
May 15, 2018
May 15, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced the launch of Kikukawa City Texture (KCT) series, a line of semi-bespoke metal architectural products. The first of its kind is Expanded Metal – as introduced in the catalogue below.
Click here for the Expanded Metal catalogue in PDF (Japanese):
https://www.kikukawa.com/pdf/product/kct01_expanded-metal.pdf
Click here for the press release in PDF (Japanese):
2018.05.15 Kikukawa News Release KCT Series
May 8, 2018
At Kikukawa, we provide bespoke louvers regardless of the material and quantity. In collaboration with the architects, we provide metal architectural products with the required strength and quality.
The design louvers made of aluminium flat bars and stainless steel round pipes are woven to create an elegant façade.
The 70mm wide aluminium flat-bars and 50mm diameter stainless round pipes are assembled into 4000mm(L) by 1000mm (W) units within the factory. To ensure the unity of these units, the joints are designed carefully.
Multiple flat bars are precisely bent to create crests and impressions. These pieces are pre-assembled and inspected prior to the paint coating process.
By precisely metal-crafting flat bars, Kikukawa has realised an intricate louver.
At Kikukawa, we fabricate bespoke products to realise designs that are difficult with ready-made materials. Based on experience and expertise, we implement ideas from design to installation.
April 24, 2018
At Kikukawa, we select the most suitable metalworking methodology required for the project.
For instance, this project required fluted panels that are difficult to realise with extrusion – the smooth curvatures and the rigidity were ensured by carefully metalworking each panel.
By overseeing the fabrication from design to installation, Kikukawa is able to achieve the flatness and high precision required for the 600mm(W) x 3000mm(L) panels.
The photographed panels were coated with bronze sputtering and anti-finger coating.
Other metalworks or finishes are also available upon request.
For more information on Kikukawa’s metalworking technology, contact us
April 12, 2018
KIKUKAWA’s Single Mode Fiber Laser Cutting Machine can cut curved surfaces, or in other words, three-dimensionally. Based on the design data, the head of the laser cutting machine moves in three-dimensional axis (x, y, z) allowing it to be precise and high in quality.
Applicable materials include steel and stainless steel, as well as aluminium and bronze alloys.
In this case, the round pipe was laser cut into a half-circle, then drilled. These cuts and drills are performed continuously based on the design data.
The head of the machine is able to move three-dimensionally, allowing it to cut curved surfaces.
For more information on Kikukawa’s 3D processing technology, click here
April 12, 2018
April 12, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced that its employee will be lecturing at the laser processing forum of Japan International Welding Show 2018. The lecture will be focusing on Kikukawa’s welding technology, including FSW (Friction Stir Welding) and fiber laser welding.
For more information on Japan International Welding Show 2018:
https://weldingshow.jp/en/
For more information on Kikukawa’s welding technology:
Kikukawa’s Metal-crafting Technology
Click here for the press release in PDF (Japanese):
2018.04.12 Kikukawa News Release. Lecture at International Welding Show 2018
March 27, 2018
Metalworking brass comes with its own challenges. The characteristics of brass make certain shapes difficult to manufacture – welding would lead to decolourisation, and extruding or die-casting would involve costly and lengthy die fabrication process.
Machining brass is one way to overcome these problems. At Kikukawa, we are able to accommodate the production of larger three-dimensional shapes in small lots.
From the 3D CAD design data, our machine metalworks brass pieces with high precision. The maximum workable size is 2500mm(W) x 3500mm(L) x 400mm(H), and the workable materials include aluminium, stainless steel, bronze alloys, and wood.
Solid brass bars are grand to fabricate 15 handrail pieces, each with differing three-dimensional curvature. The lack of welding on these pieces ensures a high-quality finish, precise joints, and a smooth curvature.
For more information on Kikukawa’s three –dimensional metalworking technology, click here
March 13, 2018
Honeycomb backing curved bronze panels is Kikukawa’s proprietary metalworking technology that stems from honeycomb backing stainless or aluminium panels.
When consulted to fabricate bronze balustrade panels over 2m in width, Kikukawa developed and solidified two technologies – honeycomb backed bronze copper alloys and honeycomb backed curved panels. The resulting panel has high strength and the honeycomb backing upholds the panel’s flatness and curvature.
Honeycomb backing curved panels are applicable to other materials.
Honeycomb backing curved bronze panels were solidified by overcoming various challenges. This methodology allows us to fabricate products that are precise in dimension and high in quality.
The products are fabricated with care and each process has measures to ensure the quality of the products, such as jigs. However, the methodology of the final quality inspection is defined to ensure the bond strength and precision of the panels. Specialized equipment is used to test the bond strength.
March 8, 2018
March 8, 2017 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, has announced that it has developed a new finish, Tsuchime (Hammertone). To accompany this development, a new sample book has been released.
Click here for more information on Tsuchime (Hammertone) finish
Click here for the press release in PDF (Japanese):
2018.03.08 Kikukawa News Release. Tsuchime (Hammertone)
February 27, 2018
Fabrication of bespoke items comes with its own challenges – R bending complex shaped products is one example.
Typically, R bending corrugated parts requires welding pieces, which tends to compromise the aesthetics, consume time and add to the fabrication cost.
Stretch forming overcomes these difficulties. The produced products are stretched into shape, thus eliminating the need for welding.
Various corrugated louvres, with various R bending, show the versatility of stretch forming. The perforations at the edge, close to the bent corners, made this process more difficult.
The pointed area shows the joint of two R bent corrugated louvres. Joining R bent pieces are typically more difficult as it requires precision in the R curvatures.
The R bent corrugated louvres are installed, in line with the gentle folds of the facades.
The featured photos are from the Bloomberg project in London.
February 27, 2018
The News page has been redesigned to help readers find the latest news from Kikukawa.
First of this change is the launch of Metalcraft News which will feature timely updates on our factory and metal-crafting technology.
Our top page will feature the latest 10 news. And the news page now has a filtering function by category.
February 9, 2018
The following brochures have been added to our Materials and Brochures page.
Introducing Kikukawa’s metal-crafting technology, with a focus on those used at Bloomberg’s European Headquarters.
Introducing Kikukawa’s projects that were completed in 2017, such as Bloomberg’s European Headquarters and Yakushiji Temple.
February 6, 2018
KIKUKAWA was noted as the supplier of the bronze cladding for the Bloomberg’s new European headquarters project, in the Nov/Dec issue (#283) of Architecture Today that featured an editorial of the said project.
Architecture Today is a monthly British architecture magazine, that has been providing the latest architectural news to architects since the late 80s.
To find out more about Architecture Today, click here
The featured project, Bloomberg’s new European headquarters, was completed in 2017 and designed by Foster + Partners. The project that occupies roughly 3.2 acres of land is highly acclaimed for its standards of sustainability and the innovative design.
In collaboration with the designers, contractors and other manufacturers, Kikukawa’s bronze products were fabricated and now fully installed. These panels exhibit our metal craftsmanship, from the cutting-edge fiber laser welding, FSW (Friction Stir Welding) and new bending techniques, to the more traditional FURUMI (sulfurized) finish.
To find out more about Bloomberg’s new European headquarters, click here
To find out more about the Kikukawa’s technology, click here
February 2, 2018
February 2, 2018 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker, was selected as a government subsidized company, by the Ministry of the Environment, as part of a project that aims to accelerate the adoption of L2-Tech (Leading Low carbon Technology). Following this selection, the demonstration room for the selected product, radiant HVAC system “R Air-con”, is due to complete soon. With this room, Kikukawa will collect verifying data for the next three years and continue its work to improve the product.
For more information on “R Air-con”:
http://www.kikukawa.com/en/ecosia-and-green-products/
Click here for the press release in PDF (Japanese):
2018.2.2 Kikukawa news release L2-tech-room
February 2, 2018
The following content has been updated.
For more information, click here:
Technology: Bending Technology
January 26, 2018
On January 25th, 2018, a KIKUKAWA employee lectured at the 52nd technology of plasticity conference held by The Japan Society for Technology of Plasticity. Selected as one of the firms to have one-of-a-kind technology of plasticity, our metal-crafting technology such as FSW was introduced.
Various people from the fabrication industry, academia, and government came to exchange their knowledge and further their understanding of the technology of plasticity.
For more information on The Japan Society for Technology of Plasticity
http://www.jstp.jp/en/
For more information on KIKUKAWA’s metal-craft, click here
Custom Metalwork
To make an inquiry, click here
Contact Us
January 24, 2018
The following content has been updated.
For more information, click here:
Technology: Zinc Phosphate Coating
January 5, 2018
Every year, KIKUKAWA fabricates pentagon shields, “Hounou-date”, to pray for safety and prosperity in the upcoming year and to exemplify our New Year’s resolution. On the shield, there are three objects that denote the Japanese Kanji character for water, 水. Each object symbolizes our prayer: the “sword” to ward off evil, the “sickle” to bring good harvest, and the “key” for prosperity.
The root of this tradition lies with Japanese blacksmiths fabricating “Hounou-date” as a talisman against fire. By dedicating a shield with a water kanji at the beginning of the year, the craftsmen cleansed their workplace and prayed for another safe year.
KIKUKAWA still honours this practice as a sign of respect for the artisan handiwork. To hone and pass on our craftsmanship, the fabrication of the shield is carried out by younger members and Vietnamese trainees.
As per tradition, three key materials and finishes were chosen.
With the completion of Bloomberg’s European Headquarters, KIKUKAWA’s FURUMI (sulfurized) bronze panels were unveiled.
The silky blast finish, used for the water kanji, is a series of KIKUKAWA’s proprietary finish that has been selected for a number of projects including Tokyo Station and the Japanese Sword Museum.
These shields are on display at various places within our Shiroi factory.
Click here for the finish samples
Click here for the FURUMI (sulfurized) finish
Click here for the Silky Blast finish
December 20, 2017
Here is a list of contents updated or added on our corporate website until 2017. This includes new contents or new Project Gallery and Technology pages.
20 Dec. 2017 – Project Gallery: Sumitomo Azabu Juban Building
20 Dec. 2017 – Project Gallery: Shumon Door – Okudo Fire Department
18 Dec. 2017 – Project Gallery: Yakushiji Temple – Jikido Hall
4 Dec. 2017 – Project Gallery: Fuchu City Medical Association Hall
12 Oct. 2017 – Technology: 8m Bender
14 Sep. 2017 – Project Gallery: POKKE (Ueno KS Building)
7 Sep. 2017 – Technology: Zinc Phosphate Coating
1 Sep. 2017 – Project Gallery: Pavilion
2 Aug. 2017 – Technology: Silky Blast Finish
2 Aug. 2017 – Project Gallery: Creche Ropponmatsu
31 Jul. 2017 – Technology: Incremental Forming
12 Jul. 2017 – Project Gallery: Higashihama Station
30 Jun. 2017 – Project Gallery: Bloom ~mebuku (sprouting)~
19 Jun. 2017 – New Content: ecosia・Green Products
5 Jun. 2017 – New Content: Renovation
24 Apr. 2017 – New Content: Materials and Brochures
24 Apr. 2017 – New Content: Finish Samples
10 Apr. 2017 – Project Gallery: Tsukiji KY Building
6 Apr. 2017 – Project Gallery: Sumida Hokusai Museum
17 Mar. 2017 – New Content: Custom Metalwork
12 Dec. 2017 – New Content: SEASON’S GREETINGS 2017
14 Dec 2016 – Project Gallery: Shiki Juraku
14 Nov. 2016 – Renewal of Corporate Website
November 21, 2017
An article regarding KIKUKAWA digitizing its accounts payable in collaboration with financial technology (fintech) venture company, Tranzax, was featured on The Daily Engineering and Construction News (The Nikkan Kensetsu-Kogyo Shimbun, Ltd.), a Japanese nationwide construction trade paper, on November 20th.
This is one of the first examples for a medium sized metalworker to adopt a financial technology solution. The article focuses on the benefits such as the simplification of accounting work, and acceleration of cash conversion for the suppliers.
For more information on The Daily Engineering and Construction News (Japanese):
http://www.decn.co.jp/
For more information on Tranzax (Japanese):
http://tranzax.co.jp/
November 21, 2017
KIKUKAWA was featured in an article on the ArchDaily website regarding Bloomberg’s new European headquarters in London.
ArchDaily is a website that provides architectural news, project information and other related articles for architects and designers.
The article features the new European Bloomberg headquarters in London, highlighting the outstanding standards of sustainability of the building and the design which pays homage to the history of the site.
In collaboration with the designers, contractors and other manufacturers, Kikukawa contributed to the project through the fabrication of various bronze products that exhibit our metal craftsmanship.
From the series of large-scale bronze façade fins to the interior bronze ramps, roughly 43,397㎡ of bronze was used for this project. The bespoke shapes were created by combining cutting-edge metal-crafting technology, such as FSW (Friction Stir Welding) and fiber laser welding, and traditional craftsmanship, such as the FURUMI (sulfurized) finish.
To find out more about the article, click here.
To find out more about Kikukawa’s technology, click here.
October 24, 2017
KIKUKAWA is pleased to announce the launch of an email newsletter.
Through it, our readers will be informed of our projects, technologies and other newsworthy items.
To subscribe or to provide feedback, please contact us here.
September 22, 2017
An article regarding KIKUKAWA’s welding technology was featured on “Yousetsu News (Welding News)” on September 19th.
The piece highlights how the improvement of the quality of the weld adds to the beauty of the architecture. Featured technology and projects include “fiber laser welding machine”, “FSW (Friction Stir Welding machine)” and Shiki Juraku.
“Yousetsu News (Welding News)” is a weekly Japanese newspaper that covers latest updates surrounding welding news in the fabrication industry.
For more information on KIKUKAWA’s welding technology, click here:
http://www.kikukawa.com/en/technologys/
For more information on Yousetsu News (Welding News), click here (Japanese site):
http://www.sanpo-pub.co.jp/yn/
June 12, 2017
An article written by one of KIKUKAWA’s employees in the technical department was featured in the May 30th issue of “Welding News”, or Yousetsu News.
Yousetsu News is a weekly Japanese newspaper that covers latest updates surrounding welding news in the fabrication industry. The article is part of a special feature that covers the latest technology and products regarding welding of Stainless Steel.
KIKUKAWA’s article covers a breadth of information. From explanations of the material, its weldability to the KIKUKAWA’s dealings with stainless steel, our quality control and latest welding equipment such as FSW (Friction Stir Welding) and fiber laser welding machine. It also touches on Custom Metalwork, a new metalwork service that also deals with welding with new technology.
For more information on Custom Metalwork, click here.
For further inquiries, click here.
To jump to the Japanese Welding News (Yousetsu News) website, click here.
June 3, 2017
Japanese Junction in London opened on June 1st to join the launch of the London Festival of Architecture.
To celebrate, an opening reception was held at the gallery.
Japanese Junction in London is an architectural exhibition created by emerging architects and architectural designers who studied or worked in Japan. This exhibition will be part of the London Festival of Architecture which is the largest annual festival of its kind held in Europe.
The festival’s theme for this year is “Memory of Home” and the city will be filled with showcases or architects’ proposals for a new lifestyle in the urban context of London.
Duration: ~June 30th
Exhibit Location: TOTO Gallery
Related Links:
Japanese Junction in London – http://www.japanesejunctioninlondon.co.uk/
Japanese Junction – http://japanesejunction.jp/index.html
London Festival of Architecture – http://www.londonfestivalofarchitecture.org/
KIKUKAWA is a proud sponsor of Japanese Junction in London.
http://www.kikukawa.com/en/2017/05/23/supportingjapanesejunctioninlondon/
May 23, 2017
KIKUKAWA is a proud sponsor of [Japanese Junction in London], an exhibition that will take part in the London Festival of Architecture.
The [Japanese Junction in London] is an architectural exhibition created by emerging architects and architectural designers who studied or worked in Japan. This exhibition will be part of the London Festival of Architecture which is the largest annual architecture festival held in Europe.
Duration: June 1st to June 30th
Exhibit Location: TOTO Gallery
Related Website:
Japanese Junction in London- http://www.japanesejunctioninlondon.co.uk/
Japanese Junction- http://japanesejunction.jp/index.html
London Festival of Architecture- http://www.londonfestivalofarchitecture.org/
KIKUKAWA will continue to support the efforts and works of Japanese architects within and outside of Japan as part of its continuing contribution to the architectural industry.
April 18, 2017
KIKUKAWA is announcing the official launch of a metalworking research project in collaboration with METI (Kanto Bureau of Economy, Trade, and Industry, a regional branch of Ministry of Economy, Trade, and Industry) and Fukui University.
This launch comes in response to the confirmation of the receipt of a government grant offered by SME (Organization for Small and Medium Enterprises and Regional Innovation, JAPAN) that is overseen by the Japanese Ministry of Economy, Trade, and Industry and partly under co-jurisdiction with the Japanese Ministry of Finance.
Since 2011, KIKUKAWA has been researching for ways to ease the fabrication process of double curved panels. This was in response to the increasing demand to fabricate double curved products in a more efficient manner as the international architectural designs have become more complex with the development of 3D CADs.
One of the difficulties with 3D metal forming is that it traditionally requires 6~10 times more manufacturing lead-time and cost than its counterpart, the 2D panels, as fabrication relies on a seasoned metalwork expert and/or press forging with dies.
This research hopes to establish an automated die-less 3D metal forming technology that could fabricate a wide variety of small lot custom-made large sized metal products. This innovative research, said to be the first of its kind ran by a bespoke architectural metalwork provider, is planned to be completed in 2019.
For more information on KIKUKAWA’s 3D metal forming technology, click here.
April 18, 2017
April 18, 2017 – Kikukawa released the following press release in Japanese.
-Summary of the Release –
KIKUKAWA, a bespoke architectural metalworker has announced the launch of a metalworking research project in collaboration with METI (Kanto Bureau of Economy, Trade, and Industry – a regional branch of Ministry of Economy, Trade and Industry) and Fukui University. This research hopes to establish an automated dieless 3D metal forming technology that could fabricate a wide variety of small lot custom-made large sized metal products.
Click here for the PDF version (Japanese):
2017.04.18 KIKUKAWA News Release 3D Metal Forming Research Project Launches
April 7, 2017
On April 2017, four new employees and six Vietnamese Trainees joined KIKUKAWA. To commemorate this, a company-wide meeting was held.
<Front Row: KIKUKAWA’s senior management, Back Row: new employees and Vietnamese trainees>
During the meeting, president Utsuno spoke of the KIKUKAWA spirit, “Never Say No,” that allows us to be the pioneering metal architecture specialists we are today. This spirit embodied by our approach, to take on and every challenge, is supported by every individual’s passion and autonomy for one’s job.
We hereby express our warmest welcome to the new employees and trainees. We look forward to working with them.
March 29, 2017
The large 3D off-centre pivot gate of Shiki Juraku, was featured in an article in Shoten Kenchiku. The bespoke metal gate that sits at the centre of the hotel was fabricated using dieless NC forming technique.
In the February edition of Shoten Kenchiku, Shiki Juraku’s (Kyoto’s traditional merchants’ housing style hotel) refined look and its unique concept was noted. As photographed at the centre, the bronze sulfurized texture of the gate matches and enhances the luxurious and traditional impression of the hotel. The materialization of this gate relied on dieless NC forming technique that is one of the latest metalwork processing available.
The article writes on the concept behind Shiki Juraku, the creation of ten distinct spaces where people can feel they belong. A focus on seasonal pleasures as well as Japanese Omotenashi is highlighted.
KIKUKAWA’s name is mentioned as the bespoke gate installer.
For more information on the bespoke gate of Shiki Juraku, click here.
For more information on the technology used to fabricate the large 3D off-center pivot gate, click here.
March 22, 2017
March 22, 2017 – Kikukawa released the following press release in Japanese.
-Summary of the Release-
KIKUKAWA, a bespoke architectural metalworker has announced the start of “Custom Metalwork” services. This service opens our metalwork such as cutting, bending and welding to customers outside the realm of architecture.
For more information on Custom Metalwork:
Link to Custom Metalwork
Click here for the PDF version (Japanese):
2017.03.22 KIKUKAWA News Release, Custom Metalwork
February 1, 2017
On December 12th 2016, KIKUKAWA obtained a Japanese patent for the invention of a new “Louver System.”
Patent Overview:
-Name: Louver System
-Patent Number: 6061781
-Date of Receipt: 2016/12/22
Summary of the Invention:
-Reduces heat gain while allowing efficient control of natural light
-Reduces operating energy use and running cost of the building
-Designed to be both stylish and practical
There is a growing environmental awareness in today’s world. In architecture, the responsibility to create more green and sustainable buildings is gaining momentum for architects and building owners.
Given this, KIKUKAWA worked with Dr. Jürgen Koch to invent a movable louver system, innovative in design and function that could be installed for new and existing projects.
One of the ways to increase the energy efficiency of a building is to install louvers outside of the windows. This is where the buildings are susceptible to the effects of incoming heat gain and sunlight. The exterior louvers could help control this before it enters the building thereby increasing the energy efficiency as well as reducing the installation and the running cost of the building.
Other existing louvers were able to control sunlight and heat gain; however it was not able to concurrently allow natural light to fill the room. With existing models, the building would be more energy efficient and the AC costs would be reduced, but the lighting costs would not be affected. KIKUKAWA’s new louver system addresses this problem. The design of the new system differs at the top and bottom and because both parts are movable, it allows heat gain reduction as well as efficient sunlight control depending on the intensity of insulation and the location of the sun.
KIKUKAWA is currently working on merchandising this invention. Please inquire for more details. KIKUKAWA will continue to invent and provide high-quality and high-value environmental products.
January 5, 2017
Every year, KIKUKAWA fabricates pentagon shields, “Hounou-date”, to pray for the safety and prosperity in the upcoming year and to exemplify our New Year’s resolution. On the shield, there are three objects that denote the Japanese Kanji character for water, 水. Each object symbolizes our prayer: the “sword” to ward off evil, the “sickle” to bring good harvest, and the “key” for prosperity.
The root of this tradition lies with Japanese blacksmiths fabricating “Hounou-date” as a talisman against fire. By dedicating a shield with a water kanji at the beginning of the year, the craftsmen cleansed their workplace and prayed for another safe year.
KIKUKAWA still honours this practice as a sign of respect for artisan handiwork. To hone and pass on our craftsmanship, the fabrication of the shield is carried out by younger members and Vietnamese trainees. The chosen materials and finishes are those that were most commonly used or that became the topic of conversation as a reminder of our company’s founding principles and spirit.
This year, three shields were fabricated.
The sulfurized bronze finish is a classic in Japanese architecture, but is increasingly becoming popular overseas. Our most recent project was Shiki-Juraku, a Kyo-machiya style hotel.
The bright dip anodized Aluminium is a highly reflective finish that emulates the sheen of stainless steel. The Sumida Hokusai Museum drew attention last year as the first architectural project in Japan to employ this material as an exterior.
These shields are displayed on the walls of our factory. Please take a look should you ever have a chance to pay a visit.
April 7, 2016
Lord Foster, of the internationally recognized Foster + Partners studio for architecture and integrated design, toured KIKUKAWA’s factory on March 28th, 2017 as pa2011rt of his visit to Japan.
This visitation follows Lord Foster’s wish to visit our factory, having been KIKUKAWA’s business partner for some time.
Despite the limitations in time, Lord Foster was able to view our facility, various samples and the fabrication process of the products. He was also able to see the mock-up and the fabrication of his ongoing project.
With the actual technology, craftsmanship and product in front of him, Lord Foster showed great interest, asked various questions while he felt the metal with his hands. He shared his impressions, saying, “I saw how the skilled manual work of craftsmen and cutting edge machinery was fused to produce these wonderful products. I didn’t have much time this visit, but I would like to take a closer look at the factory another day.”
At the same time, Lord Foster gifted a book, “Building with History” by Paul Goldberger. On the first page was a hand-written message, “for your great tradition of crafting metal”.
KIKUKAWA will continue to advance its technology and hone its craftsmanship to respond to the needs of industry leading architects of our time.
March 29, 2016
Kikukawa received an award at the 16th JSSA Contest for Excellent Products.
Past awards include:
13th JSSA Award for Excellent Products/Components – “De Beers Ginza Building”
15th JSSA Award for Excellent Products/Components – “Outer Panels of the Chapel at MIHO Art School”
March 29, 2016
Employees from Kikukawa’s Design Division took part in case study presentations and panel discussions at the 2015 Architectural Institute of Japan Kinki Branch Symposium. 03/11/2016
November 12, 2015
An article regarding our work was published in “Copper & Brass”, a publication of the Japan Copper Development Association.
Our unique “FURUMI” finish was used to create the effect of aged bronze in new bronze material. We fused our surface roughing technology and sulfurized technology to create a deep, sophisticated finish.