Osaki Onsen Yukiwariso no Yu
Kashiwazaki, Niigata, Japan
- Location
- Kashiwazaki, 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
Osaki Onsen Yukiwariso no Yu is set in Kashiwazaki, on the Niigata coast. The sodium-chloride water reaches 41°C here and feeds an indoor bath, an outdoor rotenburo pool and a sauna.
Insider tip — Yukiwariso no Yu celebrates the hepatica wildflower that blooms through lingering snow each March — one of Japan most beloved early spring wildflowers whose courage in blossoming before winter fully retreats has made it an emblem of Niigata resilience. Kashiwazaki City houses the Kashiwazaki-Kariwa Nuclear Power Plant, the world largest nuclear power station by generating capacity — a complex whose safety controversies since the 2007 offshore earthquake have made this onsen city also a flashpoint for Japan energy policy debates.
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.