Last updated: December 21, 2020
Unusual rock formations along the Shima River
The Shima Potholes are eight smooth holes that have formed in the riverbed of the Shima River.
The potholes have been created by thousands of years of erosion. The river's ebb and flow gradually circled stones along the riverbed and carved out these dips in the rock. The largest is now 2.9 meters wide and 1.5 meters deep.
Shima River is a beautiful place to hike. Just a kilometer upstream is Momotaro Falls, and Shima Onsen is another 2 kilometers upstream.
3520 Shima, Nakanojo, Agatsuma District (Map)
About 25 minutes by bus from Nakanojo Station
About 1 hour 5 minutes by car from Shibukawa-Ikaho IC of Kan-Etsu Expressway
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