The Hakkoda volcano includes 14 stratovolcanoes and lava domes
running the spectrom from basaltic-to-rhyolitic.
It is located south of Mutsu Bay at the northern end of Honshu.
A northern group of volcanoes, constructed within an 8-km-wide
Pleistocene caldera, appears to be younger than the southern group.
Hakkoda-Odake, Ido-dake, and Tsurugi-dake have well-preserved
craters.
Akakura-dake has a 1-km-wide explosion crater breached to
the north.
No historical eruptions are known of the Hakkoda group.
An active solfatara occurs at Ido-dake, and hot springs are
found at several locations within the caldera.
Three minor phreatic eruptions were documented from Jigoku-numa
on the SW flank of Odake volcano from the 13th-17th centuries.
Three soldiers on a training mission in July 1997 were killed
by inhalation of volcanic gas. (Smithsonian).
The following stamps are a souvenir sheet of the Towada National
Park issued July 20th, 1951.
2 yen shows mountain stream of Oirase
8 yen shows general view of Towada Lake.
14 yen shows view from Kankodai
24 yen shows views of Hakkoda mountain ranges.
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