Osaka Expo Closes With 27 Million Visits, Investment Pledges and a Fight to Save the Grand Ring

Six months on Yumeshima end with crowds and a likely surplus

World Expo 2025 closed in Osaka on October 13 after attracting more than 27 million visits, with organizers expecting a profit of at least 23 billion yen. Strong ticket sales and busy final weeks helped transform an event that began with low expectations, local concern about costs and early operational problems into a crowded international showcase.

The fair ran from April 13 to October 13 on Yumeshima, an artificial island in Osaka Bay. Across 155 hectares, around 160 countries and regions, international organizations, companies and civic groups presented technology, food and cultural programs under the theme Designing Future Society for Our Lives. Its three supporting themes were saving lives, empowering lives and connecting lives.

Visitors encountered a fragment of Mars, a beating heart grown from stem cells and Hello Kitty figures formed from algae. The Grand Ring, a timber roof rising 20 meters above the grounds and billed as the largest wooden structure ever built, became both a gathering place and the focus of a campaign to preserve more of the Expo.

Osaka hosted its first World Expo in 1970. Its second brought the event back to its usual cycle of five years after the pandemic delayed the Dubai fair, which closed in 2022. Riyadh, Saudi Arabia, is scheduled to host the next World Expo from late 2030 into 2031.

As of October 15, Osaka's financial result remained a forecast. Beyond the expected operating surplus, the fair left investment leads, commercial agreements, technology demonstrations and decisions about how much of its physical setting should survive.

What visitors found inside the living laboratory

Osaka presented the Expo as a People's Living Lab, a place where visitors could experience ideas while companies and researchers demonstrated them. Future mobility, clean energy and digital services formed part of the journey through the site rather than appearing only inside exhibition halls.

Pavilion World, Water World and Green World helped visitors navigate the compact, walkable grounds. These were guideposts rather than rigid divisions, mixing performance spaces, water features, green seating areas and places to rest. Wide shaded walkways, frequent rest stops and misting stations helped reduce fatigue.

Country and sponsor pavilions invited guests to hold meteorite fragments, watch bioengineered heart tissue pulse inside a laboratory chamber and see familiar Japanese characters recreated with living materials. Families queued for interactive exhibits, while companies and universities used smaller spaces for practical workshops and talks.

At night, synchronized drones traced constellations and symbols over Osaka Bay. Myaku Myaku, the red and blue official mascot, became a popular subject for photographs and souvenirs. Temporary photo areas and character parades turned parts of the grounds into informal performance spaces between scheduled attractions.

Digital tickets supported a reservation system designed to manage demand for popular pavilions and stage shows. Visitors could enter lotteries up to two months before their visit or seven days ahead, then seek slots allocated in order of booking through an app dashboard.

Entry was tied to a date and time, with optional reservations for attractions drawing the greatest demand. Super Early Bird ticket holders could secure additional reservations, while releases on the day gave visitors opportunities as capacity opened. Many exhibits also retained space for people without reservations, leaving room for unplanned visits while reducing physical queues at major attractions on busy weekends.

The Grand Ring becomes a preservation cause

Architect Sou Fujimoto's Grand Ring gave the site shade, a recognizable outline and a way for visitors to orient themselves. Layers of timber formed a sweeping circular canopy around the grounds, creating an interior likened to a cathedral.

The structure's long span and height demonstrated what engineered wood could achieve at a large scale. It also connected the Expo's interest in future design with a material associated with traditional construction.

Plans call for about 200 meters of the ring to be preserved on an artificial island in Osaka after dismantling. A grassroots petition with several thousand signatures urged the city and the Expo Association to save the whole structure.

An Osaka high school student helped start the campaign with a post describing the experience of walking onto the ring for the first time. The student wrote:

At the moment I stepped onto the ring, something inside me changed,

Supporters linked its preservation to growing international interest in mass timber buildings. Timber can store carbon within structural members and provide a warmth and tactile quality often absent from steel and concrete. Saving a larger portion will depend on cost, safety reviews and public support.

Water closures, insects and a rail outage tested operations

Legionella bacteria disrupted one of the Expo's main entertainment features within weeks of opening. High levels were detected at the Water Plaza fountain shows and a shallow reservoir called the Forest of Tranquility.

Daily aquatic shows were suspended while pipes were cleaned and water treatment increased. Visitors who had secured reservations lost access to those performances during the closures.

Legionella occurs naturally in water systems and can pose a health risk when people inhale it in tiny airborne droplets. That risk makes testing, sanitation and careful control of fountains and mist features necessary at a large public venue.

Swarms of midges also troubled visitors during the early weeks. Later, an outage on the only train line serving the venue caused a major disruption during peak summer heat. More than 30,000 people were delayed, and local hospitals treated dozens for illnesses associated with heat.

National pavilion leaders described the event as expensive and complicated to stage, while many praised what was delivered by the close. The director of the French pavilion described it as the most challenging Expo that pavilion team leaders had managed, while still regarding its scope as magnificent.

Hydrogen and carbon recycling move into public view

Osaka used the Expo to demonstrate Society 5.0, Japan's vision of a future organized around people and supported by digital and clean technologies. National agencies, companies and universities presented tools they hoped could move from prototypes into daily use during the next decade.

The hydrogen fuel cell boat Mahoroba offered quiet, odorless trips to the site. Energy and utility partners developed the charging and supply system supporting the service.

Electricity for the fair was generated within Osaka's grid using up to 30 percent clean hydrogen co firing at a large gas turbine plant. Co firing means using hydrogen alongside another fuel in the same generating process.

A facility near the site produced sustainable aviation fuel from waste cooking oil, demonstrating a way for airlines to reduce emissions. The Expo also hosted a carbon capture factory where research teams showed direct air capture, a process that removes carbon dioxide from the atmosphere so it can be reused in fuels and materials.

During a week devoted to the circular economy, industrial partners presented ways to reuse carbon dioxide in products and held public discussions about expanding promising approaches. The circular economy focuses on keeping resources in use rather than treating them as waste after a single purpose.

Together, the boat, power generation, aviation fuel and carbon capture projects showed several routes being explored to change how transport and industry obtain energy and use carbon.

Autonomous buses and robots demonstrate practical tasks

Level 4 autonomous buses carried passengers in and around the grounds. At this level of automation, a vehicle can operate without a driver under defined conditions.

The buses charged wirelessly through coils embedded in the road. A separate shuttle service from Osaka Station used synthetic fuel made with hydrogen and captured carbon dioxide, connecting the mobility demonstrations with the Expo's carbon recycling theme.

Robotics displays addressed assistance in homes and workplaces as well as factory operations. At the World Robot Summit in July, teams competed in tasks modeled on real assistance needs and industrial workflows.

A startup showcase in September brought young companies together with investors from around the world. Climate, health and smart city technologies were among its main areas of interest, extending the Expo's role from public demonstrations to meetings about possible commercial development.

Solar films, concrete and living materials find uses on site

Perovskite solar cells appeared as thin, flexible films powering lighting at bus shelters near the West Gate. Their placement allowed visitors to see a new solar material performing an everyday job.

Concrete designed to absorb and fix carbon dioxide was used in demonstration walkways and a Future City Pavilion. A sponsor pavilion also installed sidewalks made with artificial limestone produced by recycling carbon dioxide.

Osaka University exhibited 3D bioprinting that assembles cultured meat. Japanese industry groups and laboratories presented biomanufacturing systems that feed microalgae with carbon dioxide and turn the resulting material into products such as biodegradable plastics.

The displays connected biology with manufacturing, alongside the stem cell heart tissue and algae versions of Hello Kitty. Across these exhibits, visitors could see living cells and organisms being used to grow tissue, assemble food or supply material for products.

National pavilions connect culture, diplomacy and trade

China's pavilion hosted Sichuan Week, combining face changing opera and giant puppets with displays of products including Shu embroidery and bamboo crafts. Organizers connected the province's ecological identity with the Expo's theme of designing a greener future.

Ceremonies attended by officials and guests highlighted ties between Chinese and Japanese regions, including Sichuan and Hiroshima Prefecture. Cultural performances shared space with business matchmaking, giving regional relationships a public stage.

Turkmenistan used its pavilion for a conference dedicated to the Halk Maslahaty, a national consultative body. The gathering presented domestic priorities and goals for cooperation.

Ambassadors and Expo Association representatives placed the event within a broader effort focused on peace, trust and neutral engagement during a milestone year for Turkmenistan. The programs showed how national pavilions could serve as policy and diplomatic venues alongside their cultural displays.

Research discussions and Singapore's resource savings

A week branded SDGs plus Beyond brought together the JICA Ogata Research Institute and university experts for discussions of human security and demographic change. Their panels considered the protection of people and the effects of changing populations.

The discussions contributed to an Inochi Declaration setting out ideas for protecting lives and dignity. Its focus matched the Expo's three supporting themes of saving, empowering and connecting lives.

Singapore's Dream Sphere pavilion approached shared futures through immersive art. Its spherical structure stood in a cloudlike landscape and was covered with more than 17,000 recycled aluminum discs.

The pavilion team prioritized circular design and local sourcing. Obtaining materials locally saved an estimated 70 tons of carbon dioxide across the project's life, while integrated photovoltaics generated about 15,000 kilowatt hours during the fair.

Drip irrigation reduced water use for the landscape by roughly 60 percent. Singapore was also among the first participants to finish construction, an achievement its project partners highlighted after navigating permits and supply chains within a tight schedule.

Japan and Malaysia turn Expo contacts into a cooperation framework

Investment agencies from Japan and Malaysia signed a cooperation framework on the Expo's final day. The agreement runs for three years and aims to develop project pipelines built during the six months of the fair.

Malaysia reported 12.79 billion ringgit in investment leads involving Japanese investors. The opportunities reflected links between Tokyo's green and digital strategies and Kuala Lumpur's industrial plans.

The framework calls for joint investment promotion missions, stronger connections between companies and mutual assistance for businesses entering each country's market. Its target sectors include semiconductors, renewable energy, medical devices and advanced manufacturing.

For the agencies involved, the close of the Expo shifted the work toward developing those contacts and projects through continued cooperation.

Indonesia reports commitments as companies seek new partners

Indonesia announced $23.8 billion in investment commitments connected with its pavilion's program of 64 business forums and bilateral meetings. The agreements included memoranda of understanding, letters of intent, a joint venture and tourism packages.

The pavilion welcomed its 2.8 millionth visitor in September. It used the Tri Hita Karana theme, which stresses harmony among people, nature and the divine, to present its case for sustainable growth.

Partnerships involved state firms, major industrial groups and national carriers. Indonesia's announced commitments and Malaysia's investment leads represented different stages of commercial discussions, with further work continuing beyond the fair.

Private technology company FiEE used the Expo to present a shift from hardware toward services led by software. Its demonstrations included product authentication tools, secure file transfer, traceability using blockchain and a software as a service platform for content creators.

Software as a service gives customers access to software as an ongoing service. Blockchain traceability uses linked digital records to track information about a product or transaction.

FiEE executives said live demonstrations attracted strong interest from industry peers and potential partners. The company's experience illustrated another business role for the Expo: putting products in front of international audiences and opening conversations about possible partnerships.

Yumeshima prepares for parks and commercial uses

Plans for the Expo grounds include public parks and commercial facilities intended to keep Yumeshima active after the exhibition buildings close. The proposed preservation of part of the Grand Ring would retain a visible connection to the fair, while campaigners continue seeking a larger surviving section.

Utility infrastructure, transport links and experience gained from running the site provide a base for future events and pilot projects. Lessons from autonomous shuttles, digital ticketing and crowd management may also carry into city services and regional tourism.

Green spaces and waterfront views could create a new recreational district on Osaka Bay. The choices involve both how the land will be used and which parts of the Expo can remain useful after the temporary exhibitions disappear.

The fair's main dates and milestones were:

• April 13, 2025: World Expo 2025 opened on Yumeshima in Osaka Bay.
• July 2025: The World Robot Summit held competitions based on assistance needs and factory workflows.
• September 2025: A global startup showcase connected companies with investors, and Indonesia's pavilion welcomed its 2.8 millionth visitor.
• October 13, 2025: The Expo closed, and Japanese and Malaysian investment agencies signed their cooperation framework.
• Late 2030 into 2031: Riyadh is scheduled to host the next World Expo.

Osaka's place in the Expo tradition

World Expos have provided stages for national and technological ambition since London's Great Exhibition in 1851. The Eiffel Tower was built for the Paris event in 1889, while Osaka's 1970 Expo became a landmark in Japan's growth after the war.

The 2025 edition restored momentum after the pandemic disrupted the event's cycle. Riyadh will take over with a program lasting six months and extending into 2031.

Osaka also carried its shared design agenda beyond the exhibition grounds into communities and factories across Japan. A Co Design Challenge, guided by a committee focused on outcomes, invited designers and producers to develop practical goods and services for daily life.

Selected projects included benches made with local wood and products created from upcycled materials. The process favored workable ideas that could increase environmental awareness and encourage new habits, reflecting the People's Living Lab approach on a smaller scale.

The Expo's lasting results therefore extend across several areas: a likely operating surplus, investment discussions requiring continued work, technologies demonstrated in public and a waterfront site awaiting its next uses. The Grand Ring campaign gives those decisions an immediate human focus, as supporters press to retain more of the structure that came to symbolize the event.

The Bottom Line

• Osaka's World Expo ran from April 13 to October 13, 2025, and recorded more than 27 million visits.
• Organizers expected a profit of at least 23 billion yen after strong ticket sales and busy final weeks.
• About 200 meters of Sou Fujimoto's Grand Ring is planned for preservation, while a petition seeks to save the entire structure.
• Legionella caused water show closures, and a train outage delayed more than 30,000 people during summer heat.
• Demonstrations included hydrogen transport, carbon capture, autonomous buses, flexible solar films, cultured meat and materials made using recycled carbon dioxide.
• Malaysia reported 12.79 billion ringgit in Japanese investment leads and signed a cooperation framework lasting three years.
• Indonesia announced $23.8 billion in investment commitments connected with 64 business forums and bilateral meetings.
• Parts of Yumeshima are planned for parks and commercial facilities. Riyadh's next World Expo is scheduled for late 2030 into 2031.