Oku Tenryu Fudo Onsen Sawaya
Tenryu, Nagano, Japan
- Location
- Tenryu, Nagano, Japan
- Water type
- sulfurous
- Temperature
- 44 °C
- pH
- 6.5
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Oku Tenryu Fudo Onsen Sawaya, in the town of Tenryu, Nagano, near the river of the same name, taps sulfurous water at 44°C, with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Oku Tenryu Fudo Onsen Sawaya is a secluded mountain onsen in the deep Tenryu River gorge area of Nagano, surrounded by dense cedar forest. The volcanic sulfurous waters carry a distinctive mineral fragrance characteristic of this remote alpine zone. Arrive early to secure a private rotenburo slot overlooking the river canyon. The rustic thatched bathing house retains an authentic Edo-era atmosphere rarely found at more accessible resorts.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 44 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).