About Senju Onsen Sennen no Yu
"Senju Onsen Sennen no Yu" is a luxurious day-use hot spring in Tokamachi City, Niigata Prefecture, offering 100% free-flowing natural spring water. Its mildly alkaline sodium bicarbonate and chloride spring is known as a rich amber beauty bath with a silky-smooth feel. The bathing area features a hinoki cypress bath and a stone bath that alternate weekly between men and women, along with a spacious open-air bath and tsuboyu pot baths made with Shigaraki ware, letting you enjoy the famous waters in a variety of styles. It also has a high-temperature dry sauna and a cold plunge bath fed by continuously flowing underground water, making for a fulfilling totonou experience that is also popular with sauna enthusiasts.