A convenient and modern onsen spa out in the city of Kaizuka, Misasa no Yu draws the water for its baths from a natural hot spring discovered as recently as 2019. Bubbling up from some 620 metres underground, the water is slightly alkaline, meaning that it has a pH level of just over 7 and is suitable for bathers with sensitive skin.
The baths at Misasa no Yu range from a mellow and cloudy ‘silk bath’ to a kids’ bath with its own army of little rubber ducks. There’s also a private bathing room for families and groups, though this has to be booked in advance. The facility includes a restaurant and a ganbanyoku stone sauna.