下呂温泉（幸田ポンプ所）
Gero Onsen (Koden Pump Station)Sodium Chloride spring
- 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.
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
An alkaline simple thermal spring fed from the Koden pump station of the Gero hot-spring supply. At pH 9.4 the water sits near the top of the alkaline band and has the slippery, soft-handed feel that places it in Japan's beauty-water family, while the overall load stays light at 353.9 mg/kg of dissolved solids — gentle rather than assertive. What it does carry is metasilicic acid at 66.7 mg/kg, enough to leave the thin silica film that makes skin feel noticeably smoother after a soak. The posted analysis names the spring-type indications for this water as autonomic nervous system instability, insomnia and depressed mood, over the general list of chronic muscle and joint pain and stiffness.
Analyzed Dec 3, 2018·一般財団法人 岐阜県公衆衛生検査センター
