Yamaguchi Onsen
Kai, Yamanashi, Japan
- Location
- Kai, Yamanashi, 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
Yamaguchi Onsen is located in Kai, Yamanashi prefecture. The bicarbonate water, heated to 40°C with a pH of 8, feeds an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Yamaguchi, the mountain mouth, sits on the floodplain where the Fuefuki River drains from the Yatsugatake highlands into the Kofu basin. Kai city is the ancient heartland of the Takeda clan whose cavalry tradition and strategic genius shaped the Sengoku period, and Takeda Shingen's spirit pervades every hillside here.
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.