An observation sauna with outstanding openness, where you can gaze out at the majestic form of Mount Yufu through the large windows. The far-infrared stove gently warms you from the core and encourages a pleasant sweat. Soft music plays inside, letting you spend a luxurious moment facing yourself while taking in the spectacular view. It is installed in Asagirinoyu, which operates on a mixed-use rotation basis, so both men and women can enjoy this view depending on the time of day.

A cold plunge bath lavishly filled with natural spring water that bubbles up from Unagi Hime Shrine. The water quality is astonishingly soft, with a smooth, mellow feel that seems to cling to the skin. It is refreshingly cold yet never harsh, gently enveloping your overheated body after a sauna session. The crisp clarity unique to natural water and its silky feel against the skin bring a deep sense of refreshment.