A deep spring drawn from strata approximately 75 million years old. The bicarbonate spring's unique keratin-softening effect leaves the skin surface soft and smooth. Immediately after soaking, you feel a 'silky' smoothness, with a strong sensation of your fingertips gliding over your skin. It has high cleansing power, leaving a 'lightness of bare skin' after bathing, as sebum and old keratin are removed. Suitable for sensitive skin and ideal for long soaks.

A high-temperature deep spring from strata dating back about 200 million years, the dinosaur era. As a chloride spring, it forms a 'salt insulation film' on the skin surface, promoting blood circulation and providing strong heat retention. The warmth dissipates slowly, keeping the body core warm for a long time after bathing. Effective for cold sensitivity and accumulated fatigue, it functions as a 'finishing bath' to reheat deeply after a sauna. Enhances recovery through a sweat-retention cycle.