Satoshi Itasaka surrounded by his Japanese cedar furniture in a serene workshop setting.

Satoshi Itasaka Crafts Timeless Furniture from Century-Old Japanese Cedar

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Written by Sam Johnson

2026-07-21

Designer Satoshi Itasaka introduces FLAT/FORM, a unique furniture collection conjured from 15 mm-thick veneer panels of century-old Japanese cedar. This innovative project, crafted with timber from Miyazaki-based GROWTHRING Co., Ltd., elegantly marries traditional Japanese construction techniques with modern flat-pack design principles. Each piece is easily assembled and disassembled using only bolts and nuts, offering reversible construction for easy transport and repair.

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Close-up of a wooden chair, smooth finish, unique design details.

Reimagining forestry and design

As the lead designer of @h220430, Itasaka explores solutions for Japan’s declining domestic timber industry. By utilizing locally sourced cedar veneer, the collection proposes an alternative use for timber, tapping into a sustainable production cycle. The project addresses issues caused by imported competition and an aging workforce, showcasing cedar’s enduring value while meeting international export standards.

Japanese cedar table with intricate grain patterns, showcasing craftsmanship.

A synergy of tradition and innovation

FLAT/FORM draws creative inspiration from Japanese origami and kimono, transforming flat veneer into three-dimensional structures. The collection includes chairs and tables, each cut from flat panels and assembled without glue, relying on mechanical connections. This approach emphasizes visible joints, adding to the collection’s visual coherence and functionality.

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Collection of various wooden stools, each with a distinct design.

The art of assembly

Satoshi sanding a large wooden surface in his workshop.

The collection’s various pieces like the No. 2 High Chair and No. 4 Desk highlight the simplicity and elegance of a bolt-and-nut assembly system. You could easily disassemble each item, enabling hassle-free transportation and reducing packaging waste. Repairs are straightforward, further extending the lifecycle of each furniture piece.

Set of minimalist wooden shelves, elegantly arranged against a wall.

Designing for sustainability

Detailed view of a handcrafted wooden desk, emphasizing joints and finish.

FLAT/FORM’s minimalist design preserves the distinctive grain and texture of the Miyazaki sugi cedar, showcasing the natural beauty of 100-year-old timber. The exposed joints and flat-pack capability contribute to a reduced environmental footprint, promoting the reuse of local forest resources and sustainable forestry practices.

A small wooden side table with a distinctive cedar grain pattern.

Project details

Display of varied wooden furniture pieces in a showroom setting.
  • Designer: Satoshi Itasaka, @h220430
  • Client: GROWTHRING Co., Ltd.
  • Manufacturing: DAIWA-TSUKIITA CORPORATION
  • Materials: 15 mm-thick veneer panels from over 100-year-old Japanese cedar, M4 bolts and nuts
  • Dimensions: Varies per piece, including No. 1 Dining Chair (W495 × D440 × H660 mm) and No. 3 Lounge Chair (W605 × D660 × H550 mm)
  • Photographer: Yoshiki Uchida / Photo Design Studio Inc. (Japan)
Satoshi Itasaka discussing design concepts with a colleague in the workshop.

Through FLAT/FORM, Itasaka and his collaborators champion a vision where design innovation meets sustainable forestry, offering functional beauty that transcends its origins.

Elegant wooden cabinet with sleek lines and polished surface finish.
Satoshi applying a finish to a wooden surface, ensuring smoothness.
Several wooden chairs with varied backrest designs, showcasing craftsmanship.

Sources & Links

Source: designboom.com

Frequently asked questions

What materials does the FLAT/FORM furniture collection use?

The FLAT/FORM furniture collection uses 15 mm-thick veneer panels from century-old Japanese cedar, M4 bolts, and nuts.

How are the FLAT/FORM pieces assembled?

Each piece in the FLAT/FORM collection is easily assembled and disassembled using only bolts and nuts, relying on mechanical connections without glue.

What traditional Japanese elements inspire the FLAT/FORM collection?

The FLAT/FORM collection draws creative inspiration from Japanese origami and kimono, transforming flat veneer into three-dimensional structures.