 However, the Japan Meteorological Agency, in compliance with international standards since 2003, considers that a volcano is active if it has erupted during the Holocene, for the last 10,000 years or so, or shows significant geothermal activity.As a result, the entire Hachimantai Plateau (including Mount Hachimantai) in its list of active volcanoes in Japan.In 1882, a villager discovered a native sulphur outcrop in the village of Matsuo, at the foot of the southeast slope of Mount Chausu.