温泉閣
OnsenkakuSampled at wellhead
塩
Chloride
Classification
Sodium Chloride spring
A sodium chloride spring (legacy name 'junshokuen-sen') rising in the Kannawa district of Beppu. The water is salty, heat-retaining, and weakly acidic, with a slightly salty taste. The source emerges at a scalding 96 °C, placing it among Japan's hottest natural sources. It also carries a generous 193 mg/kg of metasilicic acid, leaving the kind of silica film that makes skin feel noticeably smoother.
pH
5.20
Weakly acidic
Source temperature
96.2°C
Hot
Tonicity
3.68g/kg
Hypotonic
Free CO₂
22mg/kg
Low
Free H₂S
0.20mg/kg
Low
- Color
- colorless and clear
- Taste
- slightly salty
- Odor
- odorless
Highlights
- High silica
- Top-decile hot
Analyzed Oct 25, 2004·株式会社住化分析センター 大分事業所·Cert no. 4543922-0-5