Tokyo, Japan




Object, Furniture

Total floor area



Aki Hamada Architects (Aki Hamada, Musashi Makiyama)

AR consultant

Eri Sumitomo Architects(Eri Sumitomo)


Enshu Structural Consultants(Noboru Enshu)




Jisoku 1 jikan




When we visited Hida no Mori (the forest of Hida) to see trees for making a furniture piece, we encountered trees with unique twisting shapes growing on a hilly landscape. We were mesmerized by their unconstrained curves. Although these distorted trees were traditionally used for the beams in architecture, their difficulty in application limits their use only to be cut into wood chips these days. Any sawn wood can be bent using steam or cut threedimensionally into a curved surface. However, facing the twisted trees in the forest, we wondered if this beautiful curvature full of vitality could be precisely incorporated into the design. By discovering untapped resources in the woods using modern technology, we aimed to add new value to the forestry industry and deal with the free shapes of trees with minimum waste.

Torinosu」は根曲がり木を3Dスキャンし、複雑な形状を3次元的に扱い厳密に利用している。そしてMixed Realityヘッドセットを用いたAR技術で墨出しを容易にし、高度な職人の技術とAR技術を組み合わせることによってこの構築物は成立している。Reciprocal frameの原理の構造形式によって、1150kgを超える重い木々が相互に支え合いながら自立している。ここで用いる補助線は、平面は六角形の軸線であるが、その軸に通る根曲がり木はそれぞれが異なる形と重心をもつ。三次元的な配置角をARによって規定し、1本の木に対して異なる2つの平面で切断するという、最小限の操作で構造体を成立させた。

For “Torinosu,” the distorted trees were 3d scanned so their complex shapes could be precisely handled threedimensionally. AR technology made marking on the distorted trees easier by using a mixed reality (MR) headset and realized the structure in combination with the skills of highly experienced artisans. This free-standing structure where pieces of heavy wood over 150kg mutually supporting each other is based on the principle of the reciprocal frame. The auxiliary lines set for this structure are axes in a planar hexagon, but each distorted wood piece on each axis has different shapes and centers of gravity. The three-dimensional arrangement angles were determined in AR, and this structure was built with the minimum operation of cutting each tree with two different planar surfaces.


Human beings have always tried to rationalize and regulate the forms and the forces of nature in order to make them easier for humans to handle. However, we hope to envision a future where nature and humans achieve rich and advanced coexistence. “Torinosu” was designed to symbolize such a world and to be an opportunity for people to think about the ecosystem. This structure is not just a technological experiment but a small objet d’art for us to think about the way we live in this complex yet organic modern society.