Kotoku Onsen
Yamaga, Kumamoto, Japan
- Location
- Yamaga, Kumamoto, 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
Kotoku Onsen, in Yamaga, Kumamoto Prefecture, taps sodium-chloride thermal water at 41°C, offering an indoor bath, an open-air outdoor bath (rotenburo) and a sauna for a relaxing stop.
Insider tip — Kotoku Onsen serves Yamaga City, whose thermal springs have flowed continuously for over 1,700 years — Yamaga Onsen history traces to the reign of Emperor Keiko when the spring was discovered during a hunting expedition to the Chikugo highlands. The city is internationally recognized for the Yamaga Lantern Festival each August when hundreds of female dancers wearing elaborate hand-crafted paper-lantern headdresses lit from within perform the ancient Bon-odori through floodlit streets in one of Kyushu most elegant traditional dance spectacles.
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.