Located on the 5th floor, the top floor of the main building, this panoramic large bath overlooks the tranquil flow of the Chikuma River and the beautiful satoyama across the river. The indoor bath uses chic two-tone granite, and beyond it lies a nostalgic wooden bathhouse with an open, atmospheric panoramic open-air bath. Filled with a smooth natural hot spring that carries a faint sulfur aroma and flows in 100% natural free-flowing form, it is a place where you can savor this famous spring anytime, all night long, from dusk until the stars come out.

A private open-air bath reserved for staying guests, located on the side opposite the top-floor large bath. In complete tranquility, free from interruption, this luxurious space lets you enjoy 100% natural free-flowing hot spring water while taking in the splendid views of the Chikuma River basin. The slightly cloudy water is gentle on the skin and slowly eases away daily fatigue and chronic stiffness. 45-minute reservation required, fee applies.

An exquisite guest-room private open-air bath and indoor bath installed in rooms such as the detached tatami-annex "Mimatsutei" and the newly created special room "Tsukikaze Retreat" on the 4th floor of the main building. Whenever you like, you can soak as much as you wish in the famous sulfur-scented spring, flowing directly from the source at 100%, and enjoy a completely private 24-hour bathing experience. A luxurious bathing facility that meets a variety of needs, including stay-inside-and-relax recuperation, families with small children, and universal design with wheelchair accessibility.