Yudomari Onsen

Three concrete-framed pools sit right on the coastal rocks of Kodakarajima (小宝島), where spring water wells up greenish and salty between the stones. The water runs hot at the back pool and cools toward the sea-facing one. There is no roof and no changing room, just a cold freshwater shower nearby. Mixed bathing. The spring is also known as Kodakara no Yu (子宝の湯), a name tied to a local belief that bathing here and praying at the nearby Kodakara Shrine brings the blessing of children.