An aroma sauna installed in the men's large bath area, featuring two luxurious HARVIA CILINDRO stoves. In the quiet room, which has no television, U-shaped benches are arranged so you can focus deeply on sauna bathing. Staff regularly perform löyly using herbs and aromatic water, filling the room with pleasant steam, heat, and fresh fragrance, creating an exceptional sweating experience.

Another sauna in the men's large bath area. High-quality hinoki cypress is used throughout the walls, floor, and benches, and the moment you open the door, a clean and soothing hinoki aroma fills the space, deeply relaxing both body and mind. It uses a Metos convection stove, and with regular auto löyly, you can comfortably spend time watching television in a space wrapped in gentle, steadily warming heat and moisture.

A newly renovated auto löyly sauna in the women's large bath area, powered by a Metos stove. Its distinctive design, with entry from the second-tier level, raises the perceived temperature so that warmth reaches all the way to the feet. On spacious benches, guests can comfortably and thoroughly enjoy sweating while being surrounded by the pleasant, moist heat of the automatically supplied löyly.

A mist sauna in the women's large bath area, filled with gentle, fog-like steam. The room temperature is set mildly, but the high humidity promotes sweating comparable to that of a high-temperature sauna. The seating is blended with black silica that generates negative ions, and you can also enjoy a foot bath at the same time. This is a low-stress healing sauna that warms you gradually from the feet up and deep within the body.

A cold plunge bath in the large bath area using Koganeyu's crystal-clear underground water. It pleasantly and evenly envelops and tightens the body after it has been thoroughly warmed by the sauna or the beauty bath's simple sulfur spring. The water has a mellow quality, with a sharp coolness that still blends smoothly with the skin, bringing a refreshing sense of clarity. Another highlight is the smooth flow into the open-air bath for a pleasant outdoor air bath, known as Koganebokko.