Osaka Expo 2025 : The Grand Ring

Osaka Expo 2025 Grand Ring

Location
The Grand Ring was located on Yumeshima Island in Osaka, Japan, forming the central organising structure of the Osaka Expo 2025 site.

Architect
Sou Fujimoto

Completed
2025 (now mostly dismantled)

Architectural Style
Contemporary timber architecture, civic infrastructure and large-scale temporary event design.

About the Building
The Grand Ring was the defining architectural feature of Osaka Expo 2025. Designed as a vast circular timber structure, it surrounded the Expo site and brought together the many pavilions, pathways and gathering spaces into one cohesive architectural gesture.

Rather than functioning as a single building, the Ring operated more like a piece of urban infrastructure. It provided shade, circulation, orientation and elevated views across the Expo grounds, while also giving the site a clear visual identity. Its scale was monumental, but the repeated timber columns and beams create a rhythm and warmth that softened the experience at ground level.

The structure also drew on Japan’s long history of timber construction, while reimagining it at an extraordinary contemporary scale. From below, the Grand Ring became a study in repetition, shadow and structural order. From above, it transformed into a continuous promenade, allowing visitors to move around the Expo site while looking out across the pavilions, city and bay.

Visiting the Osaka Expo was an experience!

The first time I saw the incredible ring I knew I had to visit. The grand circle was the largest wooden structure in the world, built especially for the expo. I visited in September 2025, and had absolutely no idea how incredibly busy it would be.

On this trip I was in Japan for only one week, and was only transiting through Osaka on the way to Naoshima, and then on the way to Tokyo. There was no way I was going to be able to squeeze a visit in with my itinerary, but luckily after an amazing visit to Naoshima, I was running a few hours ahead on my way back into Osaka. I shifted my train from Osaka to Tokyo out by a few hours and created a 5 hour window for a lightning visit to the Expo!

The site was absolutely MASSIVE. I could easily have spent 3 days here visiting all the different pavilions and photographing the structure. There were people everywhere, huge lines to get into the popular sites (and you had to book a slot in advance). I knew I could only focus on a small area with the time I had available, so I focused on the structure of the ring, and perhaps to walk around the circumference. I quickly realised even that would be more than I could fit, and get back to Osaka station for my train, so I concentrated on the area near the entrance.

I was so lucky with the conditions while I was there, I had around 2 hours leading into sunset and then an hour or so post sunset. The light spilling across the structure was just beautiful and gave the intricate wooden construction fabulous depth and dimension.

It was a completely different experience to walk through the underside of the ring and look up at the beams towering overhead. It was quite shady, and a welcome respite from the direct sun. There were thousands of people resting, walking to different sections, waiting in line for food vendors or vending machines. There was a wonderful smell of wood in the air that enhanced the feeling of being somewhere special, unique and … natural.

As the sun crept down towards the horizon, it made gorgeous patterns of light and shadow spilling through the structure. If I had a few days I would have had such a great time playing with these patterns and looking for more opportunities for compositions, or super contrasty images.

Above the ring was such a different experience. Towering three large stories above the ground, you could see across the entire site, and out to the bay. Beds of grasses and flowers were planted, emphasising that feeling of a structure drawn from nature and natural materials. Heading towards sunset thousands of people lined the railings watching the sun dip below the horizon. Later that evening there as a water and light show in the small lake, but unfortunately I had to to get back to my train to take me to Tokyo. I was enjoying myself so much I pushed it back another hour or two (for free using the app I booked with - so very handy). It meant I got to Tokyo after midnight exhausted after a pre-sunrise start at Naoshima, but it was so worth it.

This was a chance to see a modern wonder of the world that was only in existence for a very short time.