別府市温泉供給事業石垣線
Beppu City Onsen Supply Ishigaki LineOperated by · 別府市（別府市温泉供給事業）
- Color
- colorless and clear
- Taste
- almost tasteless
- Odor
- faint hydrogen sulfide
Sodium Sulfate-Chloride-Bicarbonate spring
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Sulfate SO₄²⁻
- "gypsum / Glauber's salt" — vessels and wound healing.
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
A gentle simple thermal spring piped from Beppu City's municipal onsen-supply system — the certificate names the source as the city's Ishigaki supply line, with the mayor of Beppu as the applicant. The water is neutral, lightly mineralized and easy on the skin, colorless and clear with a faint hydrogen sulfide note at the spout, while the source itself ranks among Japan's hottest. A generous 124 mg/kg of metasilicic acid places it in the classic Japanese beauty-water family, leaving the thin silica film that makes skin feel noticeably smoother. Note that the analysis was sampled at the bath inlet rather than the wellhead.
Sampled at bath inlet·Analyzed Jun 18, 2019·公益社団法人大分県薬剤師会 検査センター·Cert no. 大薬検第7R-19060009号