Located in the main building, this indoor bath and open-air bath feature a lustrous black bath that mirrors the view from the window like a polished surface. The bicarbonate and sulfate spring water is renowned as a beauty-enhancing hot spring that softens the skin, with a smooth and gentle feel. You can spend blissful moments soaking in famous hot spring waters while looking out over the peaceful satoyama landscape and the streets of Naruko.

Located in the annex, this indoor bath features a milky, cloudy white bath. The opaque water stands in striking contrast to the black bath and also contains chloride springs, warming the body deeply from within and helping you stay warm longer after bathing. You can luxuriate in two different famous hot spring waters on alternating days.

The signature large open-air bath, boasting an overwhelming spaciousness among the largest in Naruko Onsen. The huge pool-like tub is filled with abundant hot spring water, allowing you to stretch out your arms and legs and enjoy a luxurious soak in the openness of nature, with nothing to block the surrounding view.