A newly renovated sound-immersive sauna as of November 28, 2025. Developed in collaboration with sauna musician Kengo Tokusashi and WHITELIGHT, this sauna introduces a rare acoustic experience in Japan with three sound sources, including 'music exclusively for the sauna anteroom,' layered together. The sauna is designed to allow you to enjoy your stay as a 'journey of sound,' leading to a deep sense of immersion. A custom-made reflector created by Junpei Kodama, an artist from Uchiko Town, Ehime Prefecture, features an original design with five layers, creating a delicate circulation of sound and heat. The in-house developed aroma auto-löyly device releases aroma water in a shower-like manner from a high position, richly spreading the scent throughout the sauna room. The shimmering water illuminated by light creates a visually pleasant atmosphere, achieving a deeply immersive space where sound, scent, and heat circulate delicately. 'LUMO' means 'enchantment' in Finnish.

A luxurious cold plunge bath using spring water from 'Tsue no Fuchi,' selected as one of Japan's top 100 waters. Known for its pure and soft water quality, it is refreshingly cold and tightens the body. As the spring water flows continuously, it is always fresh and highly transparent. It provides a pleasant sensation of cooling down the body heated in the sauna and tightening the pores. After experiencing deep immersion in the sound-immersive 'LUMO SAUNA,' the coldness of the famous water sharpens the senses.