飛騨川温泉
Hidagawa OnsenOperated by · 下呂市
湯
Simple
- Color
- colorless and transparent
- Taste
- faintly sweet
- Odor
- a faint sulfur note
Sodium Bicarbonate-Fluoride spring
pH 9.7AlkalineStrongly alkaline
Composition fingerprint0.2 g/kg dissolved · Hypotonic
Na⁺88
HCO₃⁻34
F⁻23
CO₃²⁻18
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
Known good for
- Smooth skindry, rough skin
- Recoveryfatigue, stress
A simple thermal spring that reads strongly alkaline at the wellhead — pH 9.7 — while carrying only 165 mg/kg of dissolved solids, so the water is light on the body and the alkalinity does the work: it has the slippery, soap-like touch that places it squarely in Japan's beauty-water family. Colorless and transparent, it tastes faintly sweet straight from the source and carries a light sulfur note that the laboratory still recorded a full day after sampling. Fluoride, metasilicate and bicarbonate make up most of the small mineral load, giving a thin water more character than its totals suggest.
Sampled at wellhead·Analyzed Apr 30, 2019·株式会社神岡衛生社·Cert no. No.19-P-03188