下呂温泉
Gero OnsenSodium spring
A lightly mineralized simple thermal water in the Gero Onsen tradition, carrying just 353.9 mg/kg of dissolved solids — gentle on the body. The cations are almost entirely sodium (96.55 mval%), and with bicarbonate and carbonate ions in the mix the water is soft on the skin, of the classic Japanese beauty-water family. A generous 66.7 mg/kg of metasilicic acid leaves the kind of silica film that makes skin feel noticeably smoother afterwards.
- High silica