About Suruga no Yu Sakaguchiya
"Suruga no Yu Sakaguchiya" is a day-use hot spring facility in Numazu City, Shizuoka Prefecture, boasting 100% of its own natural hot spring source. The sodium-calcium chloride spring that rises from 1,330 meters underground is an extremely mineral-rich "warming bath" with a total dissolved solids content of over 10,000 mg/kg. It uses a unique sterilization system that does not rely on chlorine, so you can fully enjoy the true freshness and fragrance of the hot spring. The sauna area includes a full-fledged dry sauna as well as a sauna using binchotan charcoal. In addition, the cold plunge bath, generously fed with free-flowing spring water from Mt. Fuji’s underground stream, offers the superb feel and refreshing clarity unique to natural water, leading you to the ultimate state of perfect relaxation.