Bankei Onsen
Hokkaido · 蟠渓温泉
Chloride springSulfate springSulfur spring
The water here
Chloride spring 塩化物泉
Salty water. The salt leaves a thin film on the skin, so you stay warm well after leaving the bath.
Sulfate spring 硫酸塩泉
Clear water with a faintly bitter taste. Known for holding heat.
Sulfur spring 硫黄泉
The classic rotten-egg smell and milky white water. It can tarnish silver jewellery, so take it off.
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Japanese Wikipedia
Other towns in Hokkaido