Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Fujimi Onsen is a mountain hot spring in the highland town of Fujimi, situated on the Yatsugatake piedmont in the eastern part of Nagano Prefecture at approximately 1,000 meters elevation, with dramatic views of the Yatsugatake volcanic chain whose multiple peaks give it the appearance of eight summits aligned against the alpine horizon. The bicarbonate thermal waters are skin-softening and gently therapeutic, providing relaxation amid one of Nagano's most picturesque highland plateaus — a landscape of birch forests, meadows, and clear mountain streams beloved by hikers, cyclists, and artists. The unpolluted highland air, rich natural scenery, and thermal bathing combine to make Fujimi Onsen a quintessential Shinshu high-country experience.
Insider tip — Fujimi Onsen sits at the foot of the Yatsugatake volcanic range at roughly 1000 meters, where cool highland air contrasts with the warm alkaline bicarbonate spring. The water is prized locally for its gentle carbonation and skin-conditioning effects, and the surrounding larch forests turn gold in October making the approach scenic. Mornings here are crystalline and quiet, with deer occasionally visible at the treeline.