Nishi no Kawara Gensen
Kusatsu Onsen, Gunma, Japan, Japan
- Location
- Kusatsu Onsen, Gunma, Japan, Japan
- Temperature
- 52 °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
Nishi no Kawara Gensen is one of the source springs feeding Kusatsu Onsen, an iconic hot-spring resort in Gunma Prefecture, Japan. Its sulfurous, acidic water emerges at around 52 °C and supplies indoor baths, an outdoor rotenburo, and a sauna.
Insider tip — Nishi no Kawara Gensen — the source spring for Kusatsu's magnificent Nishi no Kawara Open-Air Bath, the largest outdoor onsen in Japan (434 m², 100+ bathers). Highly acidic sulfur-aluminum sulfate-chloride water (pH 1.7–2.1) at 51–94°C from the Yubatake field. Illuminated at night, surrounded by Kusatsu's forested hills. An unforgettable Japanese onsen experience. Don't miss the town's Yubatake, yumomi performance and yukata strolling.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 52 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features thermal & sulfurous & acidic water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.