Ouchi Onsen; Tentoku no Yu
Karatsu, Saga, Japan
- Location
- Karatsu, Saga, 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
Ouchi Onsen Tentoku no Yu welcomes bathers in Karatsu, Saga Prefecture, on Kyushu island. The sodium-chloride water reaches 42°C across an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — In Karatsu, the Saga city famous for Karatsu-yaki pottery and the spectacular Karatsu Kunchi autumn festival, Tentoku no Yu (heavenly virtue waters) draws saline spring water from the Genkai Sea coastal aquifer; the nearby Karatsu Castle reflected in the bay and the pine-covered Niji no Matsubara beach make this a culturally rich onsen destination in northern Kyushu.
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.