Oshima
The smallest of the Setouchi Triennale’s art islands, Oshima carries the weight of history as the site of Oshima Seishoen, one of Japan’s former Hansen’s disease (leprosy) sanatoriums.

When you think of the islands in the Seto Inland Sea, you might picture sunlit beaches, open-air art and slow coastal living. But just 20 minutes by ferry from Takamatsu in Kagawa Prefecture, the island of Oshima offers something entirely different and deeply moving. The smallest of the Setouchi Triennale’s art islands, Oshima carries the weight of history as the site of Oshima Seishoen, one of Japan’s former Hansen’s disease (leprosy) sanatoriums. This quiet, forested island invites visitors to reflect—through art, guided tours and lived testimony.
Oshima History

Oshima’s sanatorium was established in 1909 following the enforcement of the Leprosy Prevention Law. For decades, residents were taken from their families, removed from local registries and confined to life on the island. Despite medical breakthroughs in the mid-20th century, the policy remained in place until the law was finally repealed in 1996. Today, approximately 50 elderly residents remain at Oshima Seishoen. Though all have been cured, most have chosen to stay, as Oshima is now the only community they’ve ever known.
Things To Do

The most meaningful way to explore Oshima is by joining a guided tour led by volunteers from the Setouchi Triennale. These small group tours offer powerful insight into the island’s history and the lived experiences of its residents.
Art on Oshima Island
Art plays a central role in how the island shares its past. Both the Art for the Hospital Project and Setouchi Triennale installations acknowledge the pain while offering moments of beauty, healing and quiet reflection.
One of the most striking works is “Ringwanderung” by artist Tomoko Konoike, a 1.5 km circular walking trail that winds through forested hills on the island’s north side.
Oshima’s central pathways have handrails to help vision-impaired residents navigate safely and independently. Every corner of the island reflects the balance of accessibility, peace and purpose.
Cafe Shioru
Stop by Cafe Shioru, the island’s only cafe, located inside the community center and run by volunteers. The menu features handmade sweets and drinks made from local citrus and plums. More than just a rest stop, the cafe is an extension of the Art for the Hospital Project.