Kaijin no Yu is the natural hot spring bath of the Dormy Inn Express Sendai Seaside hotel in Nakano, Miyagino Ward, fed by its own spring and open to day visitors. Its high-temperature dry sauna has automatic loyly every 20 minutes, followed by a chilled cold bath and outdoor cooling in the open-air bath area. Day bathing runs 15:00 to 20:00 on weekdays and 13:00 to 20:00 at weekends; adults pay 1,070 yen on weekdays, rising to 1,300 yen from 1 November 2026.
Amenities
Sauna Rituals
Cold Plunge
Private Sauna Available
Opening Hours
Monday to Friday: 3:00 PM – 8:00 PM; Saturday to Sunday: 1:00 PM – 8:00 PM