The natural hot spring with a silky touch is "a gift from the Cretaceous period".
The host spring that is smooth to the skin is welled from 1,645 meters below ground which is the geological layer of the Cretaceous Period 70 million years ago. It is referred to as the “Hagoromo (a celestial robe of an angel) of water” for its silky texture and is gaining popularity from all over the country as water of beauty.