Iidajo Onsen
Iida, Nagano, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Iida, Nagano, Japan
- Water type
- bicarbonate
- Temperature
- 40 °C
- pH
- 8
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesSodiumCalcium
A traditional onsen is a communal bathing space rooted in ancient Japanese culture. It's a serene and tranquil setting where individuals come to relax and unwind. Guests typically soak in hot waters, often surrounded by natural surroundings, to cleanse both body and mind. A strict code of etiquette is observed, emphasizing respect for others and the bathing experience. Visitors are expected to follow traditional customs and rules, fostering a sense of community and harmony among bathers.
Insider tip — Situated in the Ina Valley with the Southern Alps as backdrop, Iidajo Onsen draws its name from nearby Iida Castle. The soft bicarbonate water is ideal for sensitive skin and pairs beautifully with local Iida pear season in autumn.
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 bicarbonate water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.