Day Use
YesDay-use hours aren't fixed: bathing usually opens around 11:00, but the closing time shifts daily depending on overnight guests, and it can't be reserved ahead of time. Calling on the day to check is the normal way to visit.
Bath-only day use (up to 1 hour) is 1,400 yen, covering the facility and bathing fee. A 3-hour option pairing the bath with a private resting room is 3,500 yen per person (3,850 yen with tax), but it can only be booked on the day itself.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Bathing Arrangements
Shared bathing area for all genders
Two baths, each normally assigned to one gender (with rotation), no mixed bathing offered.
Policies & Services
Towels available to rent or borrow
Towels are sold, not rented, for day-use visitors; bringing your own is recommended.
On-site or nearby parking available
Views
ForestPrograms
About
Kabuto Yu is the only inn at its own small onsen area, in the hills outside Atsugi. The spring rose to the surface after the 1923 Great Kanto Earthquake, at the foot of a rock shaped like a samurai helmet (kabuto), which gave the place its name. The water still comes straight from the ground and runs kakenagashi (掛け流し) through the baths with no recirculation, and reviewers keep coming back to how smooth and slick it feels on the skin. There are two small bathing areas, each with an indoor tub and a little open-air bath among the trees, one set aside for men and one for women on rotation. It's a small ryokan with an old-fashioned, homey feel rather than a grand resort, the kind of place where even a busy weekend can feel like you have the bath to yourself.
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Last updated July 22, 2026