Terasako Radium Onsen
Kitakyūshū, Fukuoka, Japan
- Location
- Kitakyūshū, Fukuoka, Japan
- Water type
- radioactive
- Temperature
- 36 °C
- pH
- 7.3
Water profile
Thermicity
Neutral
LowHigh
Soothing — neither hot nor cold, perfect balance.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
RadonLithiumBicarbonates
Terasako Radium Onsen is located in Kitakyūshū, Fukuoka Prefecture. Its water, classified as radioactive, measures 36°C. The facility has an indoor bath, an outdoor bath (rotenburo) and a sauna.
Insider tip — Terasako Radium Onsen in Kitakyūshū — one of Japan's 'radium' hot springs, containing very low levels of naturally occurring radon gas. In Japan, low-level radioactive springs (放射能泉, hoshano-sen) are medically recognised for potential benefits to blood pressure and gout. A distinctive spring type rarely found outside Japan and Central Europe.
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Frequently asked questions
How hot is the water?
The water is neutral here, around 36 °C — a perfect balance, neither too hot nor too cold.
What type of water is found here?
This spot features radioactive water.
What is the best season to visit?
The most favourable period for this spot is: Toute l'année.