Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Kita Yatsugatake Matsubarako Onsen Yatsumine no Yu, in Koumi (Nagano), draws bicarbonate water with a pH of 8, at 40°C. An indoor bath, an outdoor rotenburo bath and a sauna make up this bathhouse.
Insider tip — Yatsumine no Yu rises beside Matsubarako lake at the foot of the Yatsugatake volcanic range, whose eight peaks define the Nagano-Yamanashi border. The lake freezes in winter and the highland plateau offers superb cross-country skiing, with the soft bicarbonate spring providing the perfect warm recovery.