Niitsu Onsen
Niitsu, Niigata, Japan
- Location
- Niitsu, Niigata, Japan
- Water type
- sodium chloride, thermal
- Temperature
- 38 °C
- pH
- 7.3
Water profile
Thermicity
Neutral
LowHigh
Soothing — neither hot nor cold, perfect balance.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Effortless float
LowHigh
Dense, salty water — you float without effort.
SodiumChloruresBrome
Niitsu Onsen, in the Niitsu district of Niigata, heats sodium-chloride thermal water to around 38°C (100°F). An indoor bath, an outdoor rotenburo and a sauna round out the bathhouse.
Insider tip — Niitsu is the historic birthplace of Japan's oil industry — the country's first commercial oil well was drilled here in 1888. The hot springs tap deep sodium-rich artesian waters tied to this petroliferous geology. A fascinating industrial-heritage town with an unexpected hot spring tradition.
Nearby
Frequently asked questions
How hot is the water?
The water is neutral here, around 38 °C — a perfect balance, neither too hot nor too cold.
What type of water is found here?
This spot features sodium chloride & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.