Koyo-san is located at Tohoshinki. Niigata Prefecture Located within the Joshua Eskimo National Park. It is one of the largest rock formations in Japan, and the Kiyosaki River flows between rocks. The river has branched out of the Shinano River. There is a tunnel used as a specific pathway. The "Kyyukukyo Keokaku Tunnel" is 750 meters long. It takes about 40-60 minutes to go with scenic views at various points. At the end of the way there is a panoramic view of the scenic beauty of the rock. 360 degrees to do it. During the fall season, tourists will be amazed by the beauty of this rocky cliff.
