A kiln-shaped steam sauna that evokes the culture of therapeutic bathing from days gone by. The steam from the hot spring gently fills the room, and even at a low temperature it slowly warms you deep from within. Wrapped in soft heat, you can enjoy a luxurious perspiration experience that feels as if you are bathing your whole body in the minerals of the hot spring.

A calm and comfortable dry sauna located in the women's bath. It is set to deliver a distinct sense of heat and encourages invigorating perspiration. Enjoy the crisp, dry warmth, different from the steam bath, and it is ideal for refreshing both body and mind through alternating hot-and-cold bathing with the cold plunge bath.

A cold plunge bath made with lavish use of Hakone's abundant underground water, known for its famous quality. It is brisk and cold, yet its naturally sourced water has a smooth feel against the skin. It instantly tightens a body warmed by the sauna or hot spring, offering a refreshing cool-down experience. The path to the outdoor air bath is also convenient, supporting a perfect state of relaxation in nature.