Ryunoyu Onsen
Asahikawa, Hokkaido, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Asahikawa, Hokkaido, 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
Ryunoyu Onsen is set in Asahikawa, Hokkaido. The sodium-chloride water reaches 41°C, pH 7.3. Amenities include a covered bath, an outdoor rotenburo and a sauna.
Insider tip — In Asahikawa, Hokkaido's second city and home to the world-famous Asahiyama Zoo — where innovative enclosures let polar bears and penguins swim at eye level with visitors — Ryunoyu (dragon spring) draws deep mineral waters from beneath the Ishikari River basin; the city's extraordinary winter ramen culture pairs perfectly with post-zoo thermal recovery on cold Hokkaido evenings.
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.