Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Mugegawa Onsen, an annex of the Nishinoya hotel in Seki, Gifu Prefecture, sits along the Muge river and runs alkaline (pH 8) thermal bicarbonate water at 39°C, alongside an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Mugegawa Onsen is attached to the Nishinoya Hotel annex in Seki, Gifu — Japan's renowned blade-making capital, where master craftsmen have forged swords and knives for 700 years. The Muge river valley setting provides a tranquil forest retreat after touring the city's famous knife museum.