Oyama; Omoigawa Onsen
Oyama, Tochigi, Japan
- Location
- Oyama, Tochigi, 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
Omoigawa Onsen, in Oyama, Tochigi prefecture, draws sodium-chloride water at 41°C with a pH of 7.3, alongside an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Omoigawa Onsen in Oyama takes its name from the Omoigawa River flowing through this Kanto plain city. The spring draws from sodium-chloride strata beneath the Nasu volcanic piedmont and the facility is a practical stop on the Tohoku Shinkansen corridor, close to both Utsunomiya and Saitama.
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.