Yumeshima Phase 2 Master Plan Updated to Ver.3.0: EXPO Memorial Museum Added, Developer Tender Set for June

May 5, 2026August 13, 2026

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News Summary

Osaka Prefecture and the City of Osaka have updated the Yumeshima Phase 2 master plan to Ver.3.0, incorporating the construction of an EXPO 2025 Memorial Museum and the partial preservation of the Grand Roof Ring. An open tender for development operators will launch in June, with a developer selection decision expected within fiscal year 2026.

The Osaka Prefectural Government and the City of Osaka announced on April 30, 2026, an update to the development master plan for the post-Expo site on Yumeshima (Phase 2 area, Konohana Ward, Osaka). Following a public comment period, the plan will be formally adopted as the ‘Yumeshima Phase 2 Area Master Plan Ver.3.0,’ with an open tender for development operators launching in June of the same year. A developer selection decision is expected within fiscal year 2026.

The principal additions to the updated plan include the designation of a ‘Memorial Park Zone’ centered on a preserved approximately 200-metre section of the Grand Roof Ring (the iconic circular wooden structure built for Expo 2025), along with the establishment of an ‘EXPO 2025 Memorial Museum (provisional name)’ adjacent to that zone. The museum is intended to preserve the legacy of the World Exposition, serve as a hub for disseminating cutting-edge technology, and provide a venue for public engagement.

The foundational survey for the Memorial Park Zone will be funded through the national ‘Regional Future Grant,’ while the Ring’s initial renovation and approximately 20 years of ongoing maintenance costs will be covered by surplus funds from Expo operating revenues.

Osaka Governor Hirofumi Yoshimura had originally advocated for full demolition of the Ring before reversing course in favour of partial preservation — a policy shift that had delayed the originally planned fiscal year 2025 tender launch. The Ver.3.0 update formally restarts that process.

According to reports from the Sankei Shimbun and other outlets, Governor Yoshimura told reporters following the planning meeting: ‘Precisely because this is an artificial island with no residents, we should aim to create an overwhelmingly extraordinary, non-everyday space. It would also be ideal for the island to become one that never sleeps — connecting to the night-time economy, for instance.’

Yumeshima is being developed in three phases: Phase 1 for the integrated resort (IR), Phase 2 for the Expo venue and its post-event utilisation, and Phase 3 for long-stay residential-style development.

Business Impact Analysis

The confirmation of a concrete timeline — with the public tender opening in June — signals that general contractors, developers, and their prospective consortium partners will now move into active formation mode. Given the Phase 2 site’s adjacency to the Phase 1 IR, combined proposals spanning entertainment, MICE, and hospitality are expected to serve as the primary competitive differentiators.

On the financing side, the framework explicitly assigns the Memorial Park’s foundational survey costs to the ‘Regional Future Grant’ and Ring maintenance to Expo surplus funds. This structure meaningfully reduces the direct financial burden on development operators and represents a net positive factor in their participation calculus. That said, ground improvement and infrastructure costs are still expected to fall on the operator, making the precision of revenue-and-cost modelling a critical determinant of competitiveness in the bidding process.

The governor’s explicit reference to the night-time economy sends a clear market signal to food and beverage, entertainment, and digital content operators regarding new entry opportunities. IT vendors with smart-city and digital-twin capabilities will similarly find room to differentiate their proposals.

For investment and financial sector participants, the now-fixed project schedule is likely to prompt a reassessment of Yumeshima-related real estate valuations. (Related coverage: Konohana and Suminoe Ward Real Estate Transaction Trends in the Osaka IR Development Area — Q3 2025 MLIT Data)

Alignment with the IR’s opening timeline is expected to factor into operator evaluation criteria, making it essential to continue monitoring progress on the Phase 1 IR in parallel.

Editorial Review

The single most consequential element of the Ver.3.0 update is that Ring preservation has been formally embedded in the plan as settled policy.

With Governor Yoshimura’s political decision now formally reflected in the administrative framework, concrete procurement opportunities — for design, construction, and facilities management — have come into sharper focus. Firms in the construction and infrastructure sectors should move quickly to secure information on the Ring’s initial renovation specifications once they are released.

On the museum concept, Yumeshima is now being configured as a cluster of three distinct visitor-draw assets: the IR (Phase 1), the Memorial Park, and the Memorial Museum. While the synergistic potential for foot traffic is real, the design of visitor circulation and movement between facilities will prove decisive for the revenue performance of each component. How the tender documentation defines and addresses these flow-of-people dynamics will be a critical point to watch.

A key risk worth flagging is the compressed timeline between tender launch (June) and developer selection (within fiscal year 2026). Operators will be required to finalise their proposals while ground-condition risks and infrastructure costs remain partially unresolved — a level of uncertainty that is non-trivial.

Additionally, given that public opposition to the IR project has not fully dissipated, the content of public comments received cannot be discounted as a potential trigger for further plan revisions.

At the same time, reports of renewed IR interest in Hokkaido (the Tomakomai and Hakodate areas) are emerging concurrently. If Osaka can present a comprehensive development model that integrates post-event legacy utilisation alongside the IR itself, it stands to become the de facto national showcase for Japan’s integrated resort policy.

Sources

This article was produced with the assistance of AI and checked for accuracy by a human editor before publication. Please always verify against the original sources before making any business or investment decision.