TRANSWOOD® with Prasus® | Osaka-Kansai Expo
"TRANSWOOD® with Prasus® tiles" have been selected and installed as the flooring for the "Ray Garden | Gallery EAST" in the EXPO National Day Hall at the "2025 Japan International Exposition (Osaka-Kansai Expo)" (Dates: April 13–October 13, 2025), with sponsorship from Mitsui Chemicals, Inc.
(Photo taken on April 28)
The exhibition is open to everyone during the event, so please be sure to stop by when you visit the Osaka-Kansai Expo.
Facilities featuring "TRANSWOOD® with Prasus® Tiles"

E East Gate Zone E 13
EXPO National Day Hall "Ray Garden"
Gallery EAST
Click here for a map
EXPO National Day Hall "Ray Garden"
Consisting of four facilities
01: Main Stage: National Day and Special Day ceremonies, and other theatrical events
02: Lounge & Dining: Food and Beverage Facilities
03: Gallery EAST: Exhibitions featuring anime, fashion, and other themes will be held on a rotating basis throughout the event period.
04: Pop-up Stage (South): Music, talk events, festivals, and other activities will be held on a rotating basis throughout the event period.
Structure: Steel frame
Number of stories: 2-story
Floor area: 4,836.97 square meters
Basic Design: Yasui & Hirata Architects Joint Venture
Detailed Design, Construction, and Supervision: Konoike, Yasui, and Akihisa Hirata Group
TRANSWOOD® with Prasus®
A totally bio-based composite designed for a 100-year life cycle.

TRANSWOOD® is an eco-friendly material brand developed by Hideyuki Kasuga (Ph.D. in Engineering) based on the concept of a “material that lasts 100 years.”
Transwood, a composite material made by blending "wood-derived materials"—such as wood flour from thinned timber and CMF (cellulose microfiber)—with [Prasus®], a mass-balanced biomass resin produced from waste cooking oil and other sources, reduces CO₂ emissions and plastic usage during the manufacturing process and is a recyclable material.
Starting with its application to the tableware line of the eco-friendly lifestyle brand "hide k 1896" in 2023, development and application are currently underway across a wide range of categories, including furniture, building materials, home appliance casings, and automotive interior parts.
https://www.hk1896.com/brands/transwood
Prasus®
Biomass resin produced using a mass balance method capable of reducing GHG emissions by approximately 60%*
Prasus®, manufactured by Prime Polymer, a member of the Mitsui Chemicals Group, is a biomass resin brand produced using a mass-balance system that enables domestic manufacturing and a stable supply, reducing GHG (greenhouse gas) emissions by approximately 60% compared to petroleum-based resins. It has obtained ISCC PLUS certification to ensure traceability.
* The amount of CO2 calculated based on the biomass-derived carbon allocated using the mass balance method is used as the product’s CO2 absorption capacity.
https://www.primepolymer.co.jp/jp/sustainability/ce/prasus/index.html


Click here for more information about TRANSWOOD
