Nakahara 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
Nakahara Onsen, in Shūnan, Yamaguchi Prefecture, heats sodium-chloride water to 41°C, with an indoor bath, outdoor rotenburo and sauna.
Insider tip — Nakahara Onsen serves a residential community in Shūnan City, the industrial port that grew around the Tokuyama coal and petrochemical complex on the Seto Inland Sea coast of Yamaguchi. The mountains above Shūnan preserve traditional cedar forestry and the Jomon archaeological sites that confirm continuous human habitation in this sheltered bay landscape for over 10,000 years before the modern chemical age.
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.