Tortoise Onsen
Kōfu, Yamanashi, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Kōfu, 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
Tortoise Onsen is located in Kōfu, capital of Yamanashi prefecture, at the foot of Mount Fuji. Its bicarbonate water, alkaline at pH 8, heats to 40°C and feeds an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Tortoise Onsen, with its English-language name, welcomes international visitors to the Kofu basin where the soft bicarbonate spring water is credited with the longevity that the tortoise symbol promises. Kofu is surrounded by orchards of peaches and grapes, and Yamanashi wine has recently gained global recognition for its Koshu grape varietal.
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.