Hage no Yu Onsen; Kunugi Yu
Oguni, Kumamoto, Japan
- Location
- Oguni, Kumamoto, Japan
- Temperature
- 46 °C
- pH
- 6.5
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
SoufreSulfuresSulfates
Hage no Yu Onsen, also known as Kunugi Yu, is located in Oguni, Kumamoto Prefecture. Its sulfurous spring heats the water to around 46°C, with an indoor bath, an outdoor rotenburo bath and a sauna.
Insider tip — 'Hage no Yu; Kunugi Yu' (禿げの湯 — bald spring; 椚の湯 — oak spring) in the Waita volcanic zone of Oguni-machi. The 'bald spring' name refers to the treeless, bare volcanic hillsides characteristic of active geothermal areas — where sulfurous gas and acidic ground prevent vegetation growth. Among the 'bald' volcanic vents, oak trees (kunugi) grow where the soil chemistry allows, providing autumn acorns for the wild boar and deer of the Kuju highlands. An evocative contrast: barren volcanic earth and resilient woodland life.
Nearby
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 46 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features sulfurous & thermal water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.