Utilizes a sodium-calcium chloride spring that was first confirmed in the Kyoto Basin, springing from 1,200 meters underground. It is a rare 'high-concentration spring similar to seawater' in areas far from the sea, containing about nine times the chlorine ions of the therapeutic spring standard. When you soak in the water, it reacts with sebum to create a 'natural soap effect,' leaving your skin smooth. Additionally, the calcium content smooths the skin's surface like baby powder, leaving your skin astonishingly silky after bathing. Known as 'heat water' that warms you to the core and retains warmth, you can experience the rich power of the hot spring.