Saijo Tennen Onsen; Hiuchi no Yu
Saijō, Ehime, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Saijō, Ehime, 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
Saijo Tennen Onsen (Hiuchi no Yu), in Saijō, Ehime Prefecture, taps sodium-chloride water at 41°C, with an indoor bath, an open-air outdoor bath (rotenburo) and a sauna.
Insider tip — Hiuchi no Yu serves Saijō City at the foot of Mount Ishizuchi (1,982m, highest peak in western Japan), famous for its unique uchiwa-pon natural artesian springs where naturally pressurized underground water flows freely from bamboo pipes installed in the streets — locals and visitors fill jugs with crystal-clear Ishizuchi mountain water that has filtered through ancient granite for centuries before emerging in the city center.
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.