An automatic löyly operates every 30 minutes, filling the room with aromatic steam that also has moisturizing effects. The sauna includes a reclining area where guests can lie down and relax while warming their bodies to the core.

The Ishi no Yu sauna is built around natural stone. An automatic löyly using orange aroma operates every 30 minutes, filling the room with a sweet, refreshing scent and abundant steam. Like Ki no Yu, it offers a reclining area for lying back and fully relaxing. The solid weight and presence of the stone give the space a stable atmosphere, creating an environment that helps you focus on the warming effects.

A panoramic sauna with views of Shirakaba Lake and Mount Kurumayama. The curved, wave-inspired design projects large windows out toward the lake, creating the sensation of floating above the water. Three stoves warm the room evenly, and at 1,400 m elevation you can relax and sweat while taking in the crisp air and expansive scenery. As a swimwear-required mixed-gender area, families and couples can enjoy the sauna experience together.

A cold plunge bath continuously fed with natural spring water from Mount Tateshina. The water, sourced from high-altitude flows, is exceptionally mellow and soft. Three single-person tub baths are available.

An individual tub-style cold plunge bath continuously fed by clear spring water that has passed through the geological layers of Mount Tateshina. The indoor tub is set to about 15°C, providing a gentle whole-body cooling experience, while the outdoor tub, exposed to the air, can drop to around 9–10°C depending on the season. The single-person tub format lets you soak at your own pace and carefully release heat after the sauna.

A waterfall-style cold plunge bath located just outside the Panoramic Sauna Ku. Continuously fed with natural spring water from Mount Tateshina, the water temperature varies by season but offers a brisk, refreshing chill. The natural water poured into the tub is potable.