#214 Mt. Io (Iou yama)

Hokkaido

Mt. Io (Sulfur Mountain) is called Atosa-nupuri (Bare Mountain) in the Ainu language because of its barren, rocky face. Mt. Io is a 508m volcano that was formed sometime between 500 and 2,000 years ago. Hot steam escapes from the earth through 1,500 “fumaroles” (small vents) of various sizes. The air is heavy with the distinct odor of sulfur, and the bright yellow vents create an otherworldly sight. Volcanic gases have affected vegetation in the surrounding area.