Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Hida Takayama Tennen Onsen (Hidamari no Yu), in Takayama, Gifu Prefecture, draws on a bicarbonate spring at 40°C, with an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Hida Takayama Tennen Onsen Hidamari no Yu sits in the historic mountain town of Takayama in the Japanese Alps of Gifu Prefecture. The bicarbonate-rich water from deep alpine sources leaves skin remarkably soft, earning the nickname 'beauty water' among regulars. Takayama is renowned for its preserved Edo-period old town and morning markets, making this onsen an ideal post-sightseeing stop. The steaming baths with mountain views are especially magical during winter snowfall.