Hotel Seaside Shimabara
HOTELシーサイド島原ほてるしーさいどしまばら
Sea-view hotel with carbonated and hot-spring baths on Ariake Bay
Day Use
YesAdults 800 yen, children 400 yen. Towels sold separately for 200 yen. 10-use pass 6,000 yen.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Bathing Arrangements
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Policies & Services
A restaurant or dining room open to visitors, not only meals for overnight guests
Shower, wash stations, soap and shampoo provided
Towels to rent or borrow at the desk
Towels sold (not rented) for 200 yen tax-included.
On-site or nearby parking available
Views
SeaPrograms
About
Hotel Seaside Shimabara has two separate bath areas: the main-building Yujidokoro (湯治処) on the ground floor, with an open-air rotenburo and a large indoor bath, and the new-building panoramic bath on the sixth floor overlooking Ariake Bay. Both areas have onsen water alongside a natural carbonated spring, which is cool and unheated. The carbonated water is rare in Nagasaki and among the highest concentrations of any natural spring in Japan. Both areas also have a sauna. Day use is available.
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Last updated September 29, 2026