Ariake Onsen Sazanami no Yu
Amakusa, Kumamoto, Japan
- Location
- Amakusa, Kumamoto, 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
Ariake Onsen Sazanami no Yu is located in Amakusa, Kumamoto Prefecture, an archipelago in southwestern Japan. Its sodium-chloride water rises at 42°C, feeding an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — On the Amakusa Islands overlooking the Ariake Sea, this ripple-named spa (Sazanami = wavelets) honors the maritime character of Japan's most significant Christian martyr landscape; the nearby Amakusa Shiroshima Museum and the hidden Christian heritage sites make Amakusa a uniquely layered cultural destination where thermal bathing meets Japan's most dramatic religious history.
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.