Largest moving mirror-membrane building
- Who
- Yoichi Ochiai
- What
- 655.46 square metre(s)
- Where
- Japan (Osaka)
- When
- 15 December 2025
The largest moving mirror-membrane building is null² which measures 655.46 m² (7,055 ft² 43 in²) and was achieved by Yoichi Ochiai (Japan) in Osaka, Osaka, Japan, verified on 15 December 2025
null² (Nurunuru) was a special pavilion at Expo 2025 Osaka, Kansai, Japan, held on Yumeshima Island in Osaka. It was created by media artist Yoichi Ochiai as part of the official theme projects organised by the Japan Association for the 2025 World Exposition.