Yunoshima Onsen
Toyone-mura, Aichi, Japan
- Location
- Toyone-mura, Aichi, Japan
- Water type
- sodium chloride, thermal
- Temperature
- 40 °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
Yunoshima Onsen, in the village of Toyone, Aichi Prefecture, draws sodium-chloride thermal water at 40°C. Visitors can use an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Toyone-mura (Toyone Village) is one of Japan's remotest mountain communities — a tiny hamlet at the headwaters of the Toyone River, accessible via a dramatic winding mountain road in the innermost highlands of Aichi. Population under 1,000, surrounded by the Okutonebara Highlands and pristine cedar forests. Yunoshima Onsen here offers a genuine end-of-the-road mountain retreat: no crowds, extraordinary stargazing in zero light pollution, and the profound stillness of deep rural Japan.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
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.