One of the volcanic peak of Hakone volcanic range. The elevation is 1153 meters. The mountain is famous for the vapor springs as locals call it "Soun Jigoku" (The hell of Mt. Soun) seeping out from the northeastern side of the mountain. Many visitors confuse Mt. Soun as a name of the station junctioning two cable systems. The elevation of Mt.Soun station is 767 meters about 400 meters lower than that of the mountain where the name of the station came from.