丸釜、茹釜、竹伸し釜、下釜、御嶽の湯混合
Marugama, Yudegama, Takenoshigama, Shimogama and Ontake-no-yu BlendOperated by · （一財）野沢会
Mixed source
黄
Sulfur
+ Sulfate
- Color
- colorless and clear
- Taste
- not recorded
- Odor
- a strong hydrogen sulfide odor
Sodium-Calcium Sulfate spring
pH 9.0AlkalineHot source · 74°CSulfur-richHigh silicaTop-decile alkaline
Composition fingerprint1.0 g/kg dissolved · Hypotonic
Na⁺62
Ca²⁺37
SO₄²⁻73
Cl⁻19
◀ CationsAnions ▶
- Sodium Na⁺
- salt's cation — pairs with chloride to make the water salty.
- Sulfate SO₄²⁻
- "gypsum / Glauber's salt" — vessels and wound healing.
Known good for
- Skin conditionsatopic skin, eczema
- Circulationtired legs
- Aches & jointsstiff shoulders
- Sensitive-skin cautionbroken or dry skin
A sulfur-bearing sodium-calcium sulfate spring, blended from five wellheads — Marugama, Yudegama, Takenoshigama, Shimogama and Ontake-no-yu — and sampled where that mix is piped out for distribution. The water runs colorless and clear yet carries a strong hydrogen sulfide note, and it emerges among Japan's hottest natural sources, with sulfate lending the bath a quiet mineral body. Alkalinity gives the slippery touch that marks Japan's beauty-water family, and a generous 110 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel noticeably smoother.
Sampled at delivery pipe·Analyzed Oct 17, 2024·環境未来株式会社 総合検査センター·Cert no. KM2400027876-A1-001