山梨市三富温泉休憩施設「みとみ笛吹の湯」
Mitomi Fuefuki-no-Yu (Yamanashi-shi Mitomi Onsen Rest Facility)Operated by · 山梨市長 高木晴雄
Sampled at wellhead
湯
Simple
Classification
Sodium-Calcium Sulfate spring
An alkaline simple thermal spring (pH 8.9) sitting squarely in Japan's beauty-water family — the high pH gives the characteristic slippery feel on the skin. At the wellhead the water carries a faintly salty tang and a whisper of hydrogen sulfide; emerging at 36.7 °C, it is pumped up rather than free-flowing and would normally be reheated. Lightly mineralized at 475.7 mg/kg, the chemistry is gentle and undemanding — a soft, easy soak rather than a strong-mineral plunge.
pH
8.90
Alkaline
Source temperature
36.7°C
Warm
Tonicity
0.48g/kg
Hypotonic
Flow rate
200L/min
Typical
Free CO₂
75mg/kg
Low
- Color
- colorless and transparent
- Taste
- slightly salty
- Odor
- faint hydrogen sulfide
Highlights
- Top-decile alkaline
Analyzed Aug 26, 2019·株式会社メイキョー·Cert no. M19-1693