Shonan Natural Hot Spring Nadeshiko no Yu
A rare natural hot spring of fossil seawater, made from ancient seawater trapped in strata 1,500 meters underground and matured over time. It is rich in sodium and calcium, and its calcium concentration is especially among the highest in Japan. The water is offered without any added water, and is known for being easily absorbed into the skin and warming you from deep within. You can fully enjoy its abundant spring quality in a spacious open-air rock bath, tsubo-yu, and other open, relaxing bathing spaces.