喜四郎の湯
Kishiro-no-Yu SpringOperated by · 株式会社湯本旅館
Mixed source
塩
Chloride
+ Sulfate
- Color
- almost colorless and clear
- Taste
- tasteless
- Odor
- odorless
Sodium-Calcium Chloride-Sulfate spring
pH 7.1NeutralHot source · 51°CHigh silica
Composition fingerprint1.0 g/kg dissolved · Hypotonic
Na⁺60
Ca²⁺33
Cl⁻55
SO₄²⁻40
◀ 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
- Warmingcold sensitivity
- Circulationtired legs
- Aches & jointsstiff shoulders
Kishiro-no-Yu is a blended source — two wells, Yumoto No. 32 and Onwakai Daiichi No. 36, brought together before the water reaches the bath. The chemistry is sodium-calcium chloride with sulfate layered in for quiet body: neutral pH, moderately mineralized at 1,043 mg/kg, almost colorless and clear with neither taste nor smell. What lifts it is metasilicic acid at 128.7 mg/kg, squarely in Japan's beauty-water family — enough silica to leave a thin film that makes skin feel smoother afterwards. The sample behind this certificate was drawn at the bath inlet rather than at the wellhead.
Sampled at bath inlet·Analyzed Jul 1, 2016·一般社団法人 上田薬剤師会 検査センター·Cert no. 中28-8（No.770）