Fukushi Onsen; Esojima
Sano, Tochigi, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Sano, Tochigi, 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
Fukushi Onsen (Esojima), located in Sano, Tochigi Prefecture, draws iron-rich thermal water at 40°C. The bathhouse offers an indoor bath, an open-air outdoor bath (rotenburo) and a sauna for a relaxing stop in Japan.
Insider tip — Fukushi Onsen Esojima draws reddish-brown iron-rich water from the thermal aquifers beneath Sano in Tochigi Prefecture. The russet-colored mineral water has a characteristic metallic tang and a slightly silky texture appreciated by regulars. Located in a quiet residential district, this bathhouse serves local families and seniors. The iron content visibly stains bathtub walls and taps a warm ochre hue.
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).