Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
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Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
In Shirakawa, Gifu Prefecture, Hida Shokawa Onsen Okako no Yu taps bicarbonate water at 40°C. An indoor bath, an outdoor rotenburo, and a sauna make up this bathhouse near the Shokawa valley.
Insider tip — Hida Shokawa Onsen Okako no Yu sits in the scenic Shokawa Valley near the UNESCO-listed Shirakawa-go gassho farmhouses. Its lightly bicarbonate waters leave the skin silky and refreshed, earning it the nickname beauty bath among local women. Visit in autumn when the surrounding beech forests turn gold and steam rises dramatically from the outdoor pools.