From Monument to Material Bank: The Second Life of Expo 2025’s Grand Ring
When Expo 2025 closes in Osaka, its most arresting structure will not simply be torn down and discarded. The vast wooden “Grand Ring”, conceived as the architectural emblem of the event, is being dismantled with a second life already mapped out.
The Expo Association has created a formal reuse framework to prevent the site’s temporary buildings from becoming waste. Through its circular-market scheme, public bodies and organisations can apply to receive structural components, including the Ring’s large timber columns and engineered panels such as CLT. Allocation rounds have been staged in advance of dismantling, allowing recipients to plan transport, storage and reprocessing.
Several prefectures have already secured material. Kochi is set to receive a package of hinoki columns and CLT panels, which it intends to remake into benches, replicas and public installations that will circulate through civic spaces such as airports. Ehime will incorporate CLT panels into structures for the 2026 National Tree-Planting Festival. In Suzu City, in Ishikawa Prefecture, Ring timber is expected to be integrated into public housing as part of ongoing disaster-recovery efforts.
The process is logistical rather than ceremonial. Timber is being catalogued, transferred and reworked as dismantling proceeds. Yet the symbolism is hard to miss. Temporary mega-event architecture is often synonymous with waste. By contrast, the Grand Ring is being treated as a material reserve—designed not only for display, but for disassembly and redistribution.
In that sense, the Ring’s legacy may be less about its scale than about its afterlife: a high-profile demonstration that even monumental timber structures can be conceived as assets in circulation rather than structures with a single use.