is located in the Hidaka Mountains, Hokkaidō, Japan. It is the source of the . References Shyun Umezawa, Yasuhiko Sugawara, and Jun Nakagawa, Hokkaidō Natsuyama Gaido 4: Hidaka Sanmyaku no Yamayama (北海道夏山ガイド4日高山脈の山やま), Sapporo, Hokkaidō Shimbunshya, 1991. Google Maps Geographical Survey Institute Penkenushi