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null² to null⁴
Expo 2025’s signature pavilion null² continues as two projects: the permanent theatre null²ⁿ in Yokohama Landmark Tower and the work null⁴ at the GREEN×EXPO 2027 venue. Announcements, tickets, access, Yoichi Ochiai’s own words and his permanent exhibit at Miraikan, collected here.
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null²ⁿ opens in Yokohama on 14 October and names its gate and five areas for the first time
The operator of null²ⁿ, Yoichi Ochiai's permanent theatre in Yokohama Landmark Plaza, announced on 9 October 2026 that it opens on 14 October and revealed the gate and five areas inside.
Photo: The entrance to null²ⁿ (image from the press release)
Sustainable Pavilion 2025 Inc. press release, 9 October 2026 (via PR TIMES) ©Sustainable Pavilion
GREEN×EXPO 2027 Theme: Four Co- Subthemes Where the 1990 Expo Had One Phrase
GREEN×EXPO 2027's theme is Scenery of the Future for Happiness, with four Co- subthemes. How it differs from the 1990 Osaka flower expo's one-word theme and 183-day run.
Photo: Sakuya Konohana Kan at Tsurumi Ryokuchi, Osaka. Built for the 1990 flower expo (EXPO'90), it still operates as a greenhouse
Photo: Kirakirameister (CC BY-SA 3.0, Wikimedia Commons)
null²ⁿ reveals its triple pin badge, one month before opening
Sustainable Pavilion 2025 unveiled the design of its triple pin badge, the ticket perk for null²ⁿ, the permanent theatre opening 14 October in Yokohama Landmark Plaza.
Photo: The newly revealed original triple pin badge, with the logos of null², null²ⁿ and null⁴ in a row
Sustainable Pavilion 2025 Inc., press release, 19 September 2026 (PR TIMES)
Expo 2025 Osaka, One Year On: What Went to GREEN×EXPO 2027 and What Stayed
A year after Expo 2025 Osaka closed, here is where its legacy went: to Yokohama's GREEN×EXPO 2027, staying in Yumeshima, or handed on elsewhere.
Photo: Where the Expo 2025 legacy went, as of September 2026. The list counts by what stood at the Expo; the tables below split by destination
Chart: trip-jp.com editorial board (CC BY 4.0: reuse and adapt with credit to trip-jp.com). Map: Natural Earth
null⁴ at GREEN×EXPO 2027 and null²ⁿ in Yokohama: Where Yoichi Ochiai's null² Goes Next
Expo 2025's null² continues as null²ⁿ, a permanent theatre that opened on 14 October 2026 in Yokohama Landmark Plaza, and null⁴, rotating mirrors at the GREEN×EXPO 2027 venue.
Photo: The front of null² at Expo 2025. The mirrored wall reflected the surroundings while it deformed
©Yoichi Ochiai (from the Sustainable Pavilion 2025 Inc. press release of 26 August 2026, via PR TIMES)
null²ⁿ (Null Null Nexus) Visitor Guide: Access, Tickets and Rules at Landmark Plaza, Yokohama
Ochiai's theatre null²ⁿ opened 14 October 2026 in Yokohama Landmark Plaza, 3 min from Minatomirai Station. Timed tickets from 3,900 yen; pair it with GREEN×EXPO 2027.
Photo: Rendering of the null²ⁿ entrance on the fifth floor of Yokohama Landmark Plaza
©Sustainable Pavilion (from the Sustainable Pavilion 2025 Inc. press release of 7 April 2026, via PR TIMES)
For Expo 2025 Visitors: What Carries Over to GREEN×EXPO 2027
What carries over from Expo 2025 to GREEN×EXPO 2027: Grand Ring timber in KAJIMA TREE, two rebuilt pavilions, the Italy Pavilion, null² and character collaborations.
Photo: Rendering of the main gate
TSP Taiyo press release, 8 June 2026 (via PR TIMES)
GREEN×EXPO 2027 pavilions at a glance: from the 12 Village exhibitors to the Kanagawa Pavilion
The 21 pavilions and shops at GREEN×EXPO 2027 as of September 2026: 12 Village exhibitors, 4 theme shops, 3 official facilities and 2 local-government pavilions.
Photo: The organiser's rendering of the whole site
©Expo 2027 (GREEN×EXPO Association press release, 22 June 2026)
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