Sennen Onsen; Sennen no Yu
Tōkamachi, Niigata, Japan
- Location
- Tōkamachi, Niigata, Japan
- Water type
- sodium chloride
- Temperature
- 41 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Sennen Onsen; Sennen no Yu is located in Tōkamachi, Niigata Prefecture. The sodium-chloride water surfaces at 41°C, with an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — In Tōkamachi, one of Japan's snowiest cities and home to the Echigo-Tsumari Art Field, Sennen no Yu (thousand-year waters) offers deep warmth after trudging through meters of winter snow; the area's extraordinary snowfall and sake breweries make this onsen the perfect retreat during Japan's most celebrated snow country season.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 41 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.