Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
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Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Toyono Onsen; Ringo no Yu is located in Nagano city, Nagano Prefecture. The bicarbonate water emerges at 40°C. The bathhouse includes an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Toyono Onsen Ringo no Yu — the Apple Bath — takes its name from the surrounding Nagano apple orchards that make this region Japan's premier fruit-growing area. The bicarbonate-rich waters are famously smooth and slightly alkaline, earning the nickname bijin no yu or beauty water among regular bathers. The facility blends mountain onsen tradition with local agricultural culture, sometimes floating fresh apples in the baths during harvest season. The scenic location in the Nagano highlands makes it a perfect stop on the way to the Japanese Alps.