40.65 N, 140.88 E
summit elevation 1585 m
Kita-Hakkoda volcanic group is located in northern Honshu, Japan, and consists of eleven small stratovolcanoes and lava domes south of Matsu Bay. Each volcano has produced strombolian, phreatic, vulcanian eruptions, and lava flows.
A total of 15 cubic km of lava has been erupted over the past 400,000 years. The rate of eruption has declined over the past 100,000 years.
There are well preserved craters at Hakkoda-Odake, Ido-dake, Tsurugi-dake.
Solfatara and hot springs are located at the volcano.
On 12th July 1997 three soldiers were killed at the volcano after entering a depression (18 m long, 11 m wide, and 8 m deep), which contained high levels of carbon dioxide. Local farmers reported dead animals in many depressions around the volcano. Subsequent analysis showed the gases contained up to 20 percent CO2 by volume.