Completed “Foresting Architecture” to be provided within the Grounds of Expo 2025 Osaka-KansaiFuturistic architecture utilizing biodegradable materials was achieved.

Takenaka Corporation (President: Masato Sasaki) completed Foresting Architecture on March 27, which had been under construction using a 3D printer since August 2024, at the Ground Plaza on the site of the 2025 Japan International Exposition (Osaka-Kansai Expo).

Foresting Architecture proposes a new form of environmentally friendly architecture that combines state-of-the-art 3D printing technology with handmade craftsmanship. The facility consists of two buildings, each measuring 4.65 meters in diameter and 2.95 meters in height. During the exhibition period (April 13 to October 13, 2025), the buildings will serve as rest facilities for visitors.
The structure is made of biodegradable resin with its exterior covered in "seed paper" (Japanese paper containing plant seeds) that was created in public workshops. The project was completed through the collaborative efforts of diverse participants, including traditional craftspeople and individuals from welfare facilities. We aimed to create architecture that returns to nature, rather than becoming waste after use.
This project evolved from the "Seeds Paper Pavilion" concept, which won the Excellence Award in an in-house competition held from 2020 to 2021. Following technological development and various verification tests including strength testing, the project received building confirmation as a "temporary building for rest facilities (in accordance with Article 85, Paragraph 7 of the Building Standards Act for the 2025 Japan International Exposition)," and construction commenced in August 2024. The structure, made of cellulose acetate, was created on-site using 3D printing technology, and received a certificate of inspection in February 2024, making it Japan's first architecture utilizing a cellulose acetate structure.
We will continue to develop innovative construction technologies that harmonize with the environment and cocreate with society.

For technologies such as 3D printing and exterior planting, we are collaborating with companies specializing in respective fields to develop these technologies.