Mt. Asamayama is a triplex stratovolcano at the border of Gunma and Nagano prefectures, with an altitude of 2565 m above sea level. It has a 350-m-diameter crater called "Okama", where smoke still rises. It is known as one of the most active volcanoes in Japan.
Avastatud: 24-11-1994 Avastamiskoht: Oizumi Avastajad: Kobayashi, T.