Ishibune Onsen
Shūnan, Yamaguchi, Japan
- Location
- Shūnan, Yamaguchi, 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
Ishibune Onsen, located in Shūnan, Yamaguchi Prefecture, taps sodium-chloride water at 41°C. The facility includes an indoor bath, an outdoor rotenburo, and a sauna.
Insider tip — Ishibune Onsen, the stone boat spring, serves Shūnan City on the Seto Inland Sea coast of Yamaguchi, where the former Tokuyama petrochemical complex created one of Japan largest chemical manufacturing zones along the sheltered inland sea waters. The mountain communities above the industrial coast preserve traditional foraging and farming practices in the cedar and hinoki forests that once made Yamaguchi a major timber province of feudal Japan.
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.