Kumamoto-jo Tennen Onsen; Shiro no Yu
Kumamoto, Kumamoto, Japan
- Location
- Kumamoto, 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
Shiro no Yu (Kumamoto-jo Tennen Onsen) is located near Kumamoto Castle, in Kumamoto Prefecture, Japan. Its sodium-chloride water emerges at around 42°C and feeds an indoor bath, an outdoor rotenburo and a sauna.
Insider tip — Named in direct homage to Kumamoto Castle — one of Japan's most magnificent feudal fortresses, lovingly reconstructed after the devastating 2016 earthquake — Shiro no Yu (castle waters) channels the spiritual resilience of the city that has rebuilt itself with extraordinary determination; soaking in these castle-named springs while the restored donjon rises above the city carries profound meaning for Kumamoto's citizens and visitors alike.
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.