Kawanakajima Onsen Therme Dome
Kawanakajima, Nagano, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Kawanakajima, 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
Kawanakajima Onsen Therme Dome, in Kawanakajima, Nagano prefecture, taps bicarbonate water at 40°C with a slightly alkaline pH of 8. Its dome-shaped building houses an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Kawanakajima is hallowed ground in Japanese history as the site of five epic battles between Takeda Shingen and Uesugi Kenshin in the 16th century. The Therme Dome stands near this legendary plain where the two great warlords clashed, and its European spa format brings a cosmopolitan touch to the battlefield.
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.