横浜天然温泉くさつ

Yokohama Tennen Onsen Kusatsu is a neighbourhood bathhouse near Keikyū Idogaya station that runs on 100% spring water, a sodium bicarbonate 'black water' onsen. It has a sauna with automatic löyly and a cold bath chilled to 18 °C. Bath-only entry is ¥570; bath plus sauna with a rental towel is ¥870 on weekdays and ¥920 at weekends. Open 12:00–23:00 on weekdays and from 10:00 at weekends, closed Mondays; tattoos are allowed.

Tuesday to Friday: 12:00 PM – 11:00 PM; Saturday to Sunday: 10:00 AM – 11:00 PM