並ばない万博💙EXPO at Night💙大阪万博2025夕方からの楽しみ方💙 モバイル縦型📱仕様💙 Nail-free wooden construction
Expo’s Grand Ring Is World’s Largest Wooden Structure.
In Japanese architecture, it is possible to build without using nails using the traditional construction method called “kigumi”.
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The "large roof ring", the symbol of the venue of the 2025 Japan World Expo (Osaka, Kansai World Expo), was certified as the world's largest wooden building on March 4, 2025.
The large roof ring is a building with a width of about 30 m, a height of about 20 m, an inner diameter of about 615 m, and a circumference of about 2 km, connected in a circle of 109 wooden frame units.