奥道後第4-1号、第9号、第13号源泉集合タンク
Okudogo Springs No. 4-1, No. 9 and No. 13 Collection TankOperated by · ホテルはなゆづき
Mixed source
湯
Simple
Sodium Chloride spring
High silica
Composition fingerprint0.4 g/kg dissolved · Hypotonic
Na⁺95
Cl⁻55
HCO₃⁻19
F⁻16
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Chloride Cl⁻
- table-salt anion — coats the skin and holds heat in.
Known good for
- Smooth skindry, rough skin
- Recoveryfatigue, stress
A gentle alkaline simple thermal spring, blended in a collection tank from the Okudogo wells No. 4-1, No. 9 and No. 13. Lightly mineralized at 372 mg/kg, it is nonetheless alkaline enough at pH 8.9 to give the slippery feel of Japan's beauty-water family, helped along by 51.4 mg/kg of metasilicic acid. The posted certificate lists autonomic nervous system instability, insomnia and depressed mood among its indications. Note that the water is diluted, reheated, recirculated and chlorine-disinfected before it reaches the tub.
Analyzed Aug 15, 2023·愛媛県立衛生環境研究所