Century Marina Hakodate Spa Stella

Bay-area hotel that sells walk-in day admission to its Spa Stella bath, with a men’s medium-temperature löyly sauna and a women’s aroma mist salt sauna. The operator posts a current calendar for normal and shortened day-use hours; its private sauna suite is a guest room and does not count separately.

Day bathing 06:00–24:30 (last entry 24:00) on normal days; check shortened-day calendar