is a hot waterfall near Lake Onnetō in Akan Mashu National Park, Hokkaidō, Japan. Water of a temperature of descends from a height of . Formerly an onsen, its use as an open-air bath was discontinued after it was discovered that the site and its black mud contains an important deposit of manganese. The was designated a Natural Monument of Japan in 2000.
See also Kamuiwakka Hot Falls List of Special Places of Scenic Beauty, Special Historic Sites and Special Natural Monuments
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