Mount Kumotori stands at the boundary of Tokyo, Saitama, and Yamanashi Prefectures on the island of Honshū, Japan. With an elevation of 2,017 metres, its summit is the highest point in Tokyo. It separates the Okutama Mountains and the Okuchichibu Mountains. While it marks the end of the Ishione mountain ridge that begins near the JR Oku-Tama Station, the highest mountain ridge in Tokyo, its remote location amongst a group of mountains from both mountain ranges makes access difficult.