In leafy Sai-no-kawara kōen (park) you'll find this atmospheric 500-sq-metre rotemburo separated by a bamboo wall into men's and women's baths. Each bath can hold at least 100 people and frequently does: early morning visits afford greater privacy and tranquillity.

The baths are a 15-minute walk west from Yubatake or stop 15 on the Kusatsu Round Bus.