A hot spring district which has declared, “Gensen 100% Kakenagashi,” meaning 100% of the hot spring water is direct from the source.
Kawayu hot spring is wedged between Lake Kussharo, the largest crater lake in Japan, and Lake Mashu, one of the clearest in the world.
These hot springs are well-known, thanks to the volcanic plumes which continue to rise from Mt. Io. Indeed, the steam and the scent of sulfur is what makes this hot spring district attractive and entices the hearts of many travelers.