Kajika Onsen
Matsumoto, Nagano, Japan
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- Location
- Matsumoto, Nagano, Japan
- Water type
- bicarbonate
- Temperature
- 40 °C
- pH
- 8
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
Kajika Onsen, in Matsumoto, Nagano, draws its bicarbonate water from a spring heated to 40°C. An indoor bath, an outdoor rotenburo and a sauna are on offer in the heart of the Japanese Alps.
Insider tip — Kajika Onsen takes its name from the torrent frog native to the clear mountain streams of the Matsumoto highlands, where bicarbonate-rich waters emerge cool and refreshing at the source. The baths are heated and admired for their silky texture and subtle carbonic tang. Alpine walkers descending from the Hida range often stop here for a revitalizing soak before the drive home — a welcome ritual after the long climbs.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).