Speaking of Kusatsu-onsen, it famously features “Yumomi”, a group of women who mix the onsen water while singing a Kusatsu song. But do you know why they mix the water?
The source of this onsen is very hot and it is impossible to take the onsen as it is. Adding cold water would help to lower the temperature, but then the mineral contents will be weakened.
Yumomi were created to lower the temperature without weakening the mineral contents. This is a famous custom at Kusatsu-onsen and these days tourists can join in on the experience.
Our visit tot Kusatsu Onsen in October 2021: