Awaji International Hotel The Sun Plaza
淡路インターナショナルホテルザ・サンプラザあわじインターナショナルホテルザ・サンプラザ
Sea-view onsen hotel on Awaji Island with rock-set baths and two sauna styles
Day Use
NoDay-use bathing is suspended for the time being, with no date given for when it will resume.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Cold water plunge bath, typically used after sauna
Bathing Arrangements
A private bath you can reserve for yourself or your group
Private onsen bath in guest rooms, for overnight guests only
6F 'Namino Oto' special floor includes a room type with its own in-room onsen bath (guest reviews describe hot spring water filling a hinoki tub in-room).
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Tattoos not allowed in sauna; bath tattoo policy not separately stated but likely same.
Welcomes children and families
Elementary-school-age and younger children are excluded from the Nature/Barrel sauna; otherwise the hotel is family-friendly (indoor kids corner, courtyard kids space, family plans, children's meals).
Shower, wash stations, soap and shampoo provided
On-site or nearby parking available
Views
SeaHighlights
Utaseyu
Jet Bath
Steam Sauna
GanbanyokuPrograms
About
A hotel on Awaji Island's coast, with sea views from every room and Sumoto onsen water that runs faintly whitish and mild. The main bath floor has a large rocky open-air bath, an indoor bath with waterfall and bubble jets, and a dry sauna. Separately, two purpose-built saunas are available: a large Nature Sauna (low-heat, high-humidity, mixed-gender in sauna wear) and a private barrel-shaped Barrel Sauna with a chilled plunge pool outside. For guests wanting a more private soak, three kashikiri (貸切) rooms are on offer; Shinonome (東雲) opens with the scent of cypress and a wide window facing the sea.
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Last updated September 19, 2026