競輪温泉
Keirin OnsenSampled at wellhead
湯
Simple
Classification
Sodium Chloride-Bicarbonate-Sulfate spring
A hot (69.4 °C) simple thermal spring from the Kamegawa area of Beppu, lightly mineralized at 901 mg/kg dissolved solids. Weakly alkaline (pH 7.8) and soft on the skin, it sits comfortably in the Japanese 'beauty-water' family. The standout number is metasilicic acid at 237 mg/kg — generous enough to leave the kind of fine silica film that makes skin feel noticeably smoother after a soak. Among Japan's hottest natural sources, served clear and almost odorless.
pH
7.80
Weakly alkaline
Source temperature
69.4°C
Hot
Tonicity
0.90g/kg
Hypotonic
Flow rate
150L/min
Typical
Free CO₂
8.80mg/kg
Low
Radon
7.40Bq/kg
Low
- Color
- colorless · clear
- Taste
- nearly tasteless
- Odor
- nearly odorless
Highlights
- High silica
- Top-decile hot
Analyzed Sep 26, 2019·公益社団法人 大分県薬剤師会検査センター·Cert no. 大分県第3号