智光院温泉
Chikoin OnsenCalcium-Sodium Bicarbonate spring
- Calcium Ca²⁺
- settling and calming; can leave a white mineral bloom.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
Chikoin Onsen rises in Zentsuji as a simple, weakly radioactive cold mineral spring. Its 165.8 Bq/kg of radon places it squarely in the radon-spring family associated with the "hormesis" tradition, and comfortably past the level at which a spring is classed as therapeutically radioactive. Lightly mineralized at just 0.31 g/kg of dissolved solids and mildly alkaline, it is gentle on the body, while 64.1 mg/kg of metasilicic acid lends it a touch of Japan's beauty-water character. The source sits below 25 °C — a cold mineral spring — so it is heated before bathing.
Analyzed Jun 10, 2011·社団法人香川県薬剤師会検査センター