上山湯
Kamiyama-yu SpringOperated by · 白濱温泉土地株式会社
Sampled at wellhead
塩
Chloride
Classification
Sodium Chloride spring
A sodium chloride spring in strong-salt territory — dissolved solids of 12,620 mg/kg sit well above ocean salinity and leave a thick mineral coating on the skin. At a wellhead temperature of 75 °C it ranks among Japan's hottest natural sources, with a faint hydrogen sulfide note and a moderate salty tang at the source. Metasilicic acid at 95 mg/kg adds a thin silica film under the salt, softening the finish.
Source temperature
75.0°C
Hot
Tonicity
12.62g/kg
Hypertonic
Flow rate
563L/min
High
Free CO₂
70mg/kg
Low
Free H₂S
0.20mg/kg
Low
- Color
- colorless and clear
- Taste
- moderately salty
- Odor
- faint hydrogen sulfide
Highlights
- Strong salt
- Top-decile hot
- High silica
Analyzed Oct 4, 2017·和歌山県環境衛生研究センター·Cert no. 温泉第1080号