Hamadaira Onsen; Shioji no Yu
Suwa, Nagano, Japan
- Location
- Suwa, Nagano, Japan
- Water type
- iron-rich
- Temperature
- 40 °C
- pH
- 6.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Hamadaira Onsen (Shioji no Yu) is located in Suwa, Nagano Prefecture, Japan, near Lake Suwa. Its iron-rich water emerges at around 40°C and feeds an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Shioji no Yu in Hamadaira taps iron-bearing waters from the Suwa thermal belt running through the heart of Nagano Prefecture. The bath sits at altitude where the air is crisp and pine forests surround the compound, lending each soak a meditative tranquility. The iron content is sufficient to give the water a faint amber colour while delivering the joint-soothing minerals Nagano onsen are celebrated for. After bathing, guests can stroll the nearby ridge trail for panoramic views of the Japanese Alps.
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 iron-rich water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).