Naranosako Onsen; Iyashi no Yu
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
Naranosako Onsen, also known as Iyashi no Yu, is located in Yamaga, Kumamoto Prefecture. The sodium-chloride water reaches 41°C here and feeds an indoor bath, an open-air rotenburo pool and a sauna.
Insider tip — Iyashi no Yu, the healing spring of Naranosako valley, serves Yamaga City whose summer Yamaga Toro Matsuri is one of Kyushu most spectacular festivals — women balance extraordinary paper lantern replicas of golden shrines on their foreheads in a nocturnal procession illuminated only by the lanterns, creating a spectacle of moving light that has been designated an Important Intangible Folk Cultural Property.
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.