久野島温泉
Kunoshima Onsenラ
Radon
+ Simple
Sodium-Calcium Bicarbonate-Chloride spring
Cold mineral source · 20°CCold mineral
Composition fingerprint0.1 g/kg dissolved · Hypotonic
Na⁺51
Ca²⁺41
HCO₃⁻50
Cl⁻21
F⁻18
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
Known good for
- Recoveryfatigue, stress
Kunoshima Onsen on Ookunoshima island — classified as a weakly radioactive simple cold-mineral spring (hypotonic, neutral, cold-mineral). The wellhead emerges at just 19.5 °C, so the water is reheated for bathing rather than served at source temperature. Mineralization is light at 130 mg/kg of dissolved solids, which keeps the feel gentle and unobtrusive on the skin. The classification places it in the radon-spring family, the tradition associated with the so-called hormesis claim, and the certificate flags type-specific indications for gout, rheumatoid arthritis and ankylosing spondylitis.
Analyzed Jun 7, 2016·一般財団法人 広島県環境保健協会·Cert no. 広島県第3号
