Enjoy transported water from Hakujyu no Yu, one of the most famous hot springs in the Kanto region, in the open-air bath. The source water is drawn from the Kanagawa River in Saitama Prefecture and is a strong chloride saline spring rich in sodium. When you soak in the water, it leaves a salt film on your skin, providing excellent heat retention. After bathing, your body feels warm and it is difficult to catch a chill. It is expected to be effective for cold sensitivity and fatigue recovery, making it ideal for finishing after heating up in the sauna. Combined with the openness of the open-air bath, you can spend time deeply relaxing both body and mind.