A panoramic open-air bath on the 4th floor. The luxurious cypress-fragrant tubs are filled to the brim with pure water from the inn's own source, with no added heating or water. The water has an exceptionally soft feel, and its alkaline spring quality leaves the skin smooth, earning it a reputation as a beauty bath. Listen closely to the murmuring of the Hayakawa River and feel the pleasant river breeze, while at night you can spend a blissful moment immersed in a fantastical setting beneath a sky full of stars, wrapped in a sense of unity with nature.

A riverside open-air bath on the 1st floor. Its atmospheric stone design makes generous use of high-quality Hakuhō stone sourced locally in the Hayakawa basin. The spring 2026 renovation added a cave bath that recreates the atmosphere of the inn's former therapeutic-lodging era. Famous spring water with absolutely no added water or heating flows continuously, allowing you to feel the blessings of an ancient hot spring and the dynamism of nature in your whole body while looking out over the Hayakawa Gorge прямо in front of you.

A panoramic public bath on the top floor. It features Hinko no Yu, which uses ancient cypress that spent more than 2,000 years in the deep mountains for the tubs, and Ishikaze no Yu, built with a stately stone design. Beyond the windows, a panorama unfolds of the Hayakawa Gorge and the Kaino mountain range, where you can enjoy the changing seasons. The alkaline beauty bath gently envelops the skin, warming you from the core and keeping you warm long after you get out.

Stone-built private open-air baths that can be enjoyed in privacy. Each offers spacious room for about 15 people at the same time. Even though they are completely private spaces, they are filled with luxurious free-flowing spring water from an exceptional source, with no added heating or water. Without anyone disturbing you, you can monopolize this famous spring and its quiet atmosphere to your heart's content, with the murmuring of the Hayakawa River and the mountain streams as your background music.

Every guest room at Keiunkan is equipped with either a guest room bath or a guest room open-air bath. Most notably, just like the public baths and open-air baths, every guest room bath is supplied with pure free-flowing water from the inn's own source, with no added heating or water, including the bathwater and showers. In a private space, this promises the ultimate hot spring experience, letting you have the Guinness-recognized historic famous spring all to yourself whenever you want.