A day-use bathing facility at the heart of Yunogo Onsen in Mimasaka City. It is a historic hot spring said to have been discovered when the monk Ennin saw a heron healing its injuries there, and it has long been loved since the Meiji period as a place for therapeutic stays. The two baths, "Dynamic Bath," with four open-air tubs including a kettle-style bath and a geyser, and "Quiet Bath," with a cave bath, alternate weekly for men and women, so every visit offers a different experience. The dry sauna is fully equipped with automatic löyly, and the hinoki cold plunge bath circulates the water yet stays thoroughly cold, while relaxing on the outdoor air bench takes totonou to the next level.