鷹子温泉4号温泉
Takanoko Onsen No. 4 Spring湯
Simple
Sodium Bicarbonate-Chloride spring
Hot source · 47°CTop-decile alkaline
Composition fingerprint0.5 g/kg dissolved · Hypotonic
Na⁺98
HCO₃⁻46
Cl⁻39
◀ 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
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
Posted as the facility's newer source, Takanoko Onsen No. 4 Spring delivers gentle alkaline simple thermal water — lightly mineralized, easy on the body, and squarely in Japan's beauty-water family with its slippery, skin-smoothing alkaline feel. The posted notice lists chronic muscle and joint pain alongside the signature simple-spring indications of autonomic instability, insomnia and depressed mood. Because the source runs hot at the wellhead, the disclosure says the water is diluted to a comfortable bathing temperature and served with recirculation-filtration and chlorine-based disinfection, feeding the main bath, electric bath and walking bath.
Analyzed Dec 9, 2021·愛媛県立衛生環境研究所
