下呂温泉（幸田ポンプ所）
Gero Onsen (Koda Pump Station)Mixed source
湯
Simple
- Color
- colorless and transparent
- Taste
- tasteless
- Odor
- odorless
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
A gentle alkaline simple thermal spring drawn from Gero Onsen's Koda pump station. The alkalinity gives the slippery, soft-on-the-skin feel of Japan's beauty-water family, and a generous load of metasilicic acid leaves the kind of thin silica film that makes skin feel noticeably smoother afterwards. Mineralization is light, so the water is undemanding on the body; the posted analysis lists it for chronic muscle and joint pain and stiffness, autonomic nervous system instability, and fatigue recovery. The inn's own bath-side table notes that the tubs are fed with the blended supply from that same pump station.
Analyzed Dec 3, 2018·一般財団法人 岐阜県公衆衛生検査センター·Cert no. 岐阜県第二号
