Discover the Natural Beauty of Sanbasekikyo Gorge

A Scenic Gorge of Giant Rocks and Clear River Waters in Gunma

Located in Fujioka City, Gunma Prefecture, Sanbasekikyo Gorge is a scenic stretch of the Kanna River known for its dramatic rocks and distinctive geological landscape. The gorge extends for approximately 1.5 kilometers below Shimokubo Dam and is designated as a National Place of Scenic Beauty and Natural Monument.

The gorge is especially known for the many Sanbaseki rocks that line the V-shaped valley. The combination of unusual rock formations, the flowing Kanna River, and surrounding greenery creates a striking natural landscape that has attracted visitors for generations.

Highlights of Sanbasekikyo

🪨 The 48 Famous Rocks of Sanbasekikyo

One of the most distinctive features of Sanbasekikyo is the collection known as the “48 Rocks of Sanbaseki.” These notable rocks are scattered along the V-shaped gorge, and many have their own names based on their shapes and appearance.

The rocks are part of the Sambagawa metamorphic rock formation. Their distinctive blue-gray color, with white quartz revealed by the flowing water, gives Sanbaseki its characteristic appearance. The stones have also long been valued as ornamental garden stones throughout Japan.

🌊 A Gorge Shaped by Rock and River

The Kanna River flows between the rocks of the gorge, creating pools and rapids that add to the scenery. The contrast between the river and the unusual rock formations makes Sanbasekikyo a fascinating place to explore on foot.

The area is also known for its seasonal scenery. Fresh greenery in spring and summer and colorful autumn leaves create changing views along the gorge and surrounding mountains.

Enjoy Sanbasekikyo and the Surrounding Area

A visit to Sanbasekikyo can be combined with other attractions in the Onishi area of Fujioka City.

Nearby Yashio Onsen has a history dating back to its discovery in 1887. The hot spring is known for its mineral-rich sodium chloride and bicarbonate spring water, and several traditional inns offer bathing and accommodation.

The nearby Roadside Station Joshu Onishi also provides a convenient stop for visitors, with local food, rest areas, and exhibits introducing the history and culture of the area. 

A Place to Experience the Landscape of Gunma

Sanbasekikyo offers a different perspective on Gunma’s natural beauty. Rather than simply viewing a river gorge, visitors can observe the distinctive rocks, learn about the geology of the region, and discover the famous 48 Sanbaseki rocks as they explore the landscape.

For travelers interested in nature, geology, scenic landscapes, and lesser-known destinations in Japan, Sanbasekikyo is a memorable stop in the mountains of Fujioka.

Take a walk through Sanbasekikyo and discover the remarkable landscape created by the Kanna River and the rocks of the Sambagawa metamorphic belt.