湯沢温泉 (湯元)
Yuzawa Onsen (Yumoto)黄
Sulfur
Sodium Chloride-Sulfate spring
Hot source · 44°C
Composition fingerprint0.3 g/kg dissolved · Hypotonic
Na⁺90
Cl⁻53
SO₄²⁻25
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Chloride Cl⁻
- table-salt anion — coats the skin and holds heat in.
Known good for
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
A simple sulfur spring known as the wellhead (yumoto) of Yuzawa Onsen — alkaline, hypotonic, and hot (44.3 °C at the source). Mineralization is light at about 330 mg/kg, but the sulfur character carries a faint rotten-egg note, and the alkaline pH gives the soft, slippery feel of a Japanese 'beauty-water' spring.
Analyzed Nov 21, 2013·一般財団法人 新潟県環境分析センター·Cert no. 新潟県（登）環企第4号
