The landscape of the Sanbaseki Valley was created naturally long ago, and is scientifically important in understanding the developmental history of the Japanese Archipelge.
Sanbaseki Valley(三波石峡) is composed of rows of large boulders and rocks of unusual shape that run for approximately 1.5 km along the Kanna River in the Yuzurihara Kayakabu area. Sanbaseki is geologically classified as crystalline schist, and distribute along a long belt of exposed rocks that span 800km from the Kanto Region to the Kyushu Region.There are many hiking courses you can enjoy.
Tourist Info.
There is parking and restroom.
Access
Need a car to visit.
1. use Kanetsu Express way
2. get off at Honjo Kodama
3. drive south on 462 to Sanbaseki Onsen.
4. drive deeper.
20 min
New Wave Samurai Movie. 
映画好き集まれ！ 
The landscape of the Sanbaseki Valley was created naturally long ago, and is scientifically important in understanding the developmental history of the Japanese Archipelge.