Tennen Onsen Healthy SPA; Sun Road
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
Tennen Onsen Healthy SPA (Sun Road), in Kōfu, Yamanashi Prefecture, draws on a bicarbonate thermal spring at 40°C. Facilities include an indoor bath, an open-air outdoor bath (rotenburo) and a sauna.
Insider tip — Healthy SPA Sun Road serves Kofu City, capital of a basin surrounded by three mountain ranges — Minami Alps, Yatsugatake, and Fuji — producing a protected microclimate that yields more wine grapes and peaches than any other Japanese prefecture. Yamanashi wine production from Koshu grape varietals has achieved international recognition, and the Kofu Wine Festival each November draws sommeliers from across Japan to sample vintages made from Japan oldest domestically cultivated wine grape.
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.