Osawa Onsen Yodanosho
Matsuzaki-cho, Izu Peninsula, Shizuoka, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Matsuzaki-cho, Izu Peninsula, Shizuoka, Japan
- Water type
- sodium chloride
- Temperature
- 42 °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
Osawa Onsen Yodanosho is located in Matsuzaki-cho, on the Izu Peninsula, Shizuoka Prefecture. Sodium-chloride water surfaces at 42°C, shared between an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — Osawa Onsen in Matsuzaki on the Izu Peninsula offers one of Japan's most unique bathing formats — an open-air kawaburo where the river itself runs through the bathing area, so bathers soak in thermal waters with a cool mountain stream flowing alongside; the surrounding Matsuzaki white plaster and charcoal tile townscape is a perfectly preserved Edo-period merchant town.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 42 °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.