The claim
大阪万博のリング、木材の大半は海外産
Original review summary
The review found that the claim was false: the Expo’s official website said about 70% of the Grand Ring’s timber was domestic and 30% foreign. It also reported that architect Sou Fujimoto disputed the claim that most of the timber was Finnish.[S1]
Additional context
The review says the claim spread with a post by lawmaker Takashi Kawamura on April 21, 2025. [S1]
The review also reports that the Expo association rejected the assertion that the timber was almost entirely Finnish, while acknowledging that some laminated timber came from Finland and Sweden. [S1]
Research date:
Sources and attribution
- [S1] 日本ファクトチェックセンター original review
Original review · Retrieved October 16, 2026