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Shiretoko mine, Iouzan (Iwou-yama), Shiretoko Peninsula, Hokkaido, Japan

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Mining in 1937 and following years worked a bed of native sulfur which flowed out of Iouzan volcano as liquid sulfur "lava" at temperatures of 130 to 160 degrees C during 8 months of activity in 1936. It is estimated that the flow of native liquid sulfur exceeded 100,000 tons. This area is now part of Shiretoko National Park.

Mineral List

1 entry listed. 1 valid mineral.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


IMAI, A., & GESHI, N. (1999). Spinifex Texture of Native Sulfur: A Cooling Product of Sulfur Flow Eruptions at Shiretoko‐Iwozan Volcano, Hokkaido, Japan. Resource Geology, 49(2), 99-104.

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