Japan’s last pristine river, flowing gently through the mountains.

The Shimanto River winds for 196 kilometers through western Kochi before reaching the Pacific Ocean. Along its course, discover submersible bridges without railings, traditional river fishing, sightseeing boats, canoeing, and cultural landscapes shaped by the close relationship between nature and local life.

Three highlights of the Shimanto River

1. 1. Explore landscapes with submersible bridgesVisit Sada and Iwama submersible bridges and enjoy the distinctive sight of bridges designed to disappear beneath the water when the river rises.
2. 2. Experience the river by boat or canoeTravel along the gentle current by sightseeing boat or canoe and appreciate the mountains and river from close to the water’s surface.
3. 3. Discover a way of life shaped by the riverEncounter traditional fishing methods and foods such as wild ayu and green laver that reflect the rich resources of the Shimanto River.

Official information and directions

Visit the official websiteGet directions on Google Maps

Quick access guide

※The Shimanto River covers a wide area. Choose the bridge or activity facility you plan to visit before checking transportation. Do not approach submersible bridges when the river is rising.

Nearby attractions

• ・Cape AshizuriAt Shikoku’s southernmost cape, admire Pacific horizons and dramatic cliffs. It is an excellent extension from the Shimanto River toward Tosashimizu.
• ・Ryugado CaveExplore one of Kochi’s best-known natural attractions, a limestone cave formed over an immense span of time. It makes a rewarding stop on a journey across the prefecture.
• ・Kochi CastleThis renowned castle preserves an Edo-period keep and main citadel palace. Pair the Shimanto River’s natural scenery with Kochi’s history and culture.