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Oyunuma Pond大湯沼


Formed by the volcanic eruptions of Mt. Hiyori, Oyunuma Pond is a roughly pear-shaped pond around one kilometer in circumference and with a maximum depth of 22 meters. In the past, sulfur was extracted from here for use in gunpowder manufacturing. There are still sulfur vents at the bottom of the pond pumping out sulfur at a temperature of 130 degrees, and the surface temperature of the water is around 40–50°C. The white steam that rises silently from the pond, and the mud that comes bubbling up here and there, combine to give a real sense of the power of nature.

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place Hokkaido Isoyagunrankoshichou Yunosato
phone 0143843311



Hokkaido Isoyagunrankoshichou Yunosato [map]



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※ Every year during the winter to Mid-Nov.-Late Apr., vehicles are closed.

Information Sources:  NAVITIME JAPAN


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Hokkaido Main Areas


Not just a prefecture but an island of its own, Hokkaido is the most northerly prefecture and island of the Japanese archipelago. Arriving in Hokkaido, which is rural and bursting with breathtaking nature, means entering a world where vast national parks, towering mountains, and natural hot springs can be found at every turn. Come December, these natural splendors freeze over and morph into a winter wonderland.