Onsentei; Yuan
Kumamoto City, Kumamoto, Japan
Illustration photo — not a verified picture of this exact spot.
- Location
- Kumamoto City, Kumamoto, Japan
- Water type
- thermal
- Temperature
- 40 °C
- pH
- 7.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Balancing
LowHigh
Rich in trace elements — gentle on the skin.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
BicarbonatesCalcium
Onsentei, with its Yuan bath, is located in Kumamoto City, Kumamoto Prefecture. The thermal water flows at 40°C, pH 7.3. The facility offers an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — Onsentei Yuan is a stylish urban bathhouse in Kumamoto City drawing a lightly alkaline thermal spring prized for its softening effect on skin. The Yuan brand is known in Japan for sophisticated interior design that blends traditional onsen aesthetics with contemporary comfort. Multiple bath zones allow guests to move between indoor pools, steam rooms, and seasonal outdoor tubs. The central Kumamoto location makes it an easy addition to an afternoon exploring Kumamoto Castle.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année (idéal automne-hiver).