Day Use
YesDay-use bathing runs 12:00 to 16:00, with reception closing at 15:30.
Bathing only is 500 yen for adults and 300 yen for children. A rest-room package is also available: 2,278 yen per adult and 1,210 yen per child, covering the bathing fee, service charge, and tax, plus a bathing tax for adults.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Capabilities
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Baths listed as one each for men and women (gender-separated); no mixed bathing mentioned.
Policies & Services
Welcomes children and families
Shower, wash stations, soap and shampoo provided
Towels available to rent or borrow
Confirmed in a review about the adjoining hot-spring campsite (campers borrow towel sets from the hotel); general day-use towel rental not separately confirmed.
Relaxation space for after bathing
On-site or nearby parking available
Views
SeaHighlights
Foot BathAbout
Senami Hamanasu-so is a ryokan at Senami Onsen where every room faces the Sea of Japan. The large bathhouse and its open-air bath, one each for men and women, share that view, with Sado Island and Awashima sometimes visible out at sea, and there's a foot bath by the entrance for a quick soak without changing. Six rooms come with their own open-air tub, and two special rooms have a private indoor onsen bath. The spring itself is a salty chloride water that comes up hot and plentiful. The onsen was found by accident in 1904, when hot water gushed out during oil drilling; locals still call it atsu-no-yu (熱の湯), the hot-water spring, for how high the temperature runs. Bathing alone, without staying the night, is welcome too.
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Last updated July 30, 2026