下呂温泉（幸田ポンプ所）
Gero Onsen (Koda Pumping Station)湯
Simple
Sodium Chloride spring
Hot source · 56°CHigh silicaTop-decile alkaline
Composition fingerprint0.4 g/kg dissolved · Hypotonic
Na⁺97
Cl⁻46
F⁻18
CO₃²⁻17
◀ 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
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
An alkaline simple thermal spring drawn from the Koda pumping station in Gero. The high alkalinity gives it the slippery, soft-on-the-skin feel that places it squarely in Japan's beauty-water family. The water is only lightly mineralized and gentle on the body, yet it carries a generous load of metasilicic acid, which leaves the thin silica film that makes skin feel noticeably smoother afterwards. The posted analysis lists the spring-type indications for simple thermal water — autonomic nervous system instability, insomnia and depressed mood — alongside the standard bathing indications for stiff muscles and joints and for fatigue recovery.
Analyzed Dec 3, 2018·一般財団法人 岐阜県公衆衛生検査センター
