A full-fledged Finnish-style sauna equipped in the Nikko no Yu large bath on the 3rd floor of the main building, with self-löyly available. The compact room is filled with the pleasant aroma of Japanese cypress wood, and performing self-löyly surrounds you with high-quality heat and moist steam. The temperature is kept high, bringing abundant sweating with a gentle yet substantial intensity and a very deep sense of relaxation.

A self-löyly sauna, or thermal room, equipped in the annex spa facility Thermal Spa & Terrace THREE and used while wearing swimsuits. A sauna stove made by Metos is installed, and by pouring water on the stones you can create hot steam and adjust the temperature and humidity to your preference. In a stylish modern space, you can lavishly work up a sweat while looking out at the magnificent Pacific Ocean through the large windows.

A private sauna with self-löyly available, installed in luxurious guest rooms with a sauna. Because it is reserved for the room, you can enjoy self-löyly as often as you like during your stay, at any time, creating heat and steam to your own taste without worrying about anyone else. The room's private open-air terrace also has a cold plunge bath, giving you exclusive access to the ultimate private totonou environment.

A compact cold plunge bath for one, located right next to the sauna room in the Nikko no Yu large bath. Positioned with excellent flow right after leaving the sauna, its crisp cold water quickly cools down your heated body. Even though it uses tap water, it has a refreshing feel, and it instantly awakens both body and mind for the open-air relaxation in the outdoor area afterward, where you can feel the sea breeze, with relaxation chairs provided.

A stylish cold plunge bath for one, attached to the spa facility Thermal Spa & Terrace THREE. After working up a sweat to the limit in the self-löyly sauna, you can immediately immerse yourself in cold water to cool down. Cooling off while feeling the Pacific sea breeze on your skin is exceptionally refreshing, and it leads you to a liberating open-air relaxation experience in the terrace area with sofas.