天神泉源
Tenjin GensenSampled at mixing tank
塩
Chloride
Classification
Sodium Chloride spring
Tenjin Gensen — one of the wellheads that feeds Kin no Yu in Arima. A sodium-chloride hypersaline spring: at roughly 36 g/kg dissolved solids it exceeds ocean salinity and leaves a thick mineral coating on the skin. The wellhead emerges at 99.4 °C, putting it among Japan's hottest natural sources; its iron content oxidizes reddish-brown on air contact, which is what gives Arima's celebrated 'kinsen' (gold water) its colour. A respectable 121 mg/kg of metasilicic acid adds a layer of silica smoothness beneath the salt.
pH
6.60
Neutral
Source temperature
99.4°C
Hot
Tonicity
36.09g/kg
Hypertonic
Flow rate
53L/min
Typical
Free CO₂
189mg/kg
Low
- Color
- faintly green and turbid
- Taste
- strongly briny
- Odor
- nearly odorless
Highlights
- Strong salt
- Iron-rich
- High silica
- Top-decile hot
Analyzed Sep 24, 2019·公益財団法人 中央温泉研究所·Cert no. 甲第3734号