湯の山温泉表湯1・表湯2混合泉
Yunoyama Onsen Omote-yu No.1 and No.2 Blended SourceMixed source
湯
Simple
- Color
- almost colorless and clear
- Taste
- tasteless
- Odor
- odorless
Sodium Bicarbonate-Fluoride spring
pH 9.0AlkalineHigh radonTop-decile alkaline
Composition fingerprint0.2 g/kg dissolved · Hypotonic
Na⁺90
HCO₃⁻46
F⁻28
CO₃²⁻14
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Bicarbonate HCO₃⁻
- "soda" — softens skin, leaves it smooth.
Known good for
- Aches & jointsstiff shoulders
- Smooth skindry, rough skin
- Recoveryfatigue, stress
A blended alkaline simple spring combining Yunoyama Onsen's Omote-yu No.1 and No.2 in a two-to-one ratio at the mixing tank. At pH around 9.0 the water sits firmly in Japan's beauty-water family, with a soft, slippery feel on the skin. Total dissolved solids are light at 190 mg/kg, but the source carries a notable 46.5 Bq/kg of radon — enough to place it in the radon-bearing 'hormesis' tradition. Cold at the wellhead (25.9 °C), so the bath is reheated for soaking.
Sampled at mixing tank·Analyzed Jun 28, 2024·三重県保健環境研究所
