Osaka Expo roof recognized as world’s biggest wooden structure
Source: – Kyodo News+
The grand roof at the venue for the 2025 World Exposition in Osaka, western Japan, was recognized Tuesday as the world’s largest wooden architectural structure by Guinness World Records.
The Grand Ring, the symbol of the six-month-long global event starting April 13, has a roof area measuring over 61,000 square meters, according to the global authority on world records.

Hiroyuki Ishige (C), secretary general of the Japan Association for the 2025 World Exposition, and Japanese architect Sosuke Fujimoto (2nd from L) pose on March 4, 2025, during a ceremony in the expo’s iconic Grand Ring, recognized as the world’s largest wooden structure by Guinness World Records, on an artificial island in the western Japan city of Osaka. (Kyodo) ==Kyodo
Sosuke Fujimoto, the roof’s architect, said at the award ceremony he hoped the Expo symbol would send out a message about the importance of forming bonds in a world that has been increasingly divided lately.
The architectural symbol was completed on Feb. 27 to represent the expo philosophy of “Unity in Diversity.”
The up to 20-meter-high structure with a circumference of approximately 2 kilometers is made of approximately 27,000 cubic meters of timber, including Japanese cypress and cedar, as well as European red pines, according to the expo organizer.
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The original article: – Kyodo News+ .
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