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Kawayu Onsen

A hot spring district which has declared to have “Gensen 100% Kakenagashi” (The waters here flow 100% direct from the hot spring source source).

Kawayu hot spring is wedged between Lake Kussharo, the largest caldera lake in Japan and Lake Mashu, one of the clearest in the world.
This hot spring is famous thanks to the volcanic plumes which continue to rise from Mt. Io.

Indeed, the steam and the scent of sulfur are what makes this hot spring district attractive and entices the hearts of travelers.