Home > HOKKAIDO　北海道 > Teshikaga 弟子屈町 > Mt. Io 硫黄山
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Mt. Io is Kawayu Onsen's hot spring source. It was also a sulphur mine from 1877 to 1896. At the time, sulphur was widely used in cigarette matches and gunpowder. Keywords: hokkaido teshikaga iozan mountain sulfur volcano japanmt

Mt. Io is Kawayu Onsen's hot spring source. It was also a sulphur mine from 1877 to 1896. At the time, sulphur was widely used in cigarette matches and gunpowder.

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