渋温泉総合源泉(比良の湯、薬師の湯及びとんびの湯の混合泉)
Shibu Onsen Combined Source (blend of Hira-no-yu, Yakushi-no-yu and Tonbi-no-yu)Mixed source
硫
Sulfate
+ Chloride
Classification
Sodium-Calcium Sulfate-Chloride spring
A blended Shibu Onsen source combining the Hira-no-yu, Yakushi-no-yu and Tonbi-no-yu wells — a sodium-calcium sulfate-chloride spring drawn very hot at 65 °C. The settled, mineral-rich sulfate body carries a salty edge from the chloride sub-type, and a generous 151 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel smoother afterwards. The water is faintly yellow and clear at the source with a slight metallic iron taste, and sits among Japan's hottest natural sources.
pH
4.60
Acidic
Source temperature
65.0°C
Hot
Tonicity
1.18g/kg
Hypotonic
Free CO₂
31mg/kg
Low
- Color
- faintly yellow and clear
- Taste
- with a faint metallic iron taste
- Odor
- odorless
Highlights
- High silica
- Top-decile hot
Analyzed May 26, 2016·一般社団法人 上田薬剤師会 検査センター·Cert no. 中28-5(No.430)