The sauna located right next to the large public bath is known for its auto-löyly, which is performed every 20 minutes. Each time water is poured over the stones, pleasant steam and heat fill the room, quickly encouraging perspiration. The room is new and spotless, and the scent of wood enhances the relaxing effect. The temperature is set at around 85 degrees, offering a well-balanced experience that both beginners and sauna enthusiasts can enjoy. Thanks to the moderate humidity created by the auto-löyly, it feels less hard to breathe, and you can warm deeply from the core of your body at a leisurely pace.

The cold plunge bath located right next to the sauna is a spacious, carefully designed feature that reflects Hoshino Resorts' attention to detail. It is large enough for several people to soak comfortably at once, allowing you to relax without worrying about those around you. The water temperature is kept at around 15 to 18 degrees, cooling down your heated body after auto-löyly in an instant. In front of you stretches a garden inspired by Tosa's nature, letting you enjoy the luxurious moment of gazing at greenery while immersed in the water. It is deep enough to cool down your whole body efficiently.