嬉野温泉
Ureshino OnsenOperated by · 嬉野市
Sampled at wellhead
曹
Bicarbonate
+ Chloride
Classification
Sodium Bicarbonate-Chloride spring
A weakly alkaline sodium bicarbonate-chloride spring rising at a striking 81 °C — one of Japan's hottest natural sources at this site. The bicarbonate-dominant chemistry, classified as the legacy jūsō-sen (soda-water) style, gives the slippery feel Ureshino is famous for as one of the country's three great beauty-water onsens, while the chloride layer adds heat-retaining body. Metasilicic acid at 135.6 mg/kg leaves a faintly hydrating silica film, and the wellhead reads only mildly salty.
pH
7.71
Weakly alkaline
Source temperature
81.1°C
Hot
Tonicity
1.76g/kg
Hypotonic
Flow rate
200L/min
Typical
Free CO₂
30mg/kg
Low
- Color
- colorless and transparent
- Taste
- slightly salty
- Odor
- odorless
Highlights
- Top-decile hot
- High silica
Analyzed Mar 23, 2023·一般社団法人 佐賀県環境科学検査協会·Cert no. 2022-00028-01号