Hotel Green Plaza Hakone
ホテルグリーンプラザ箱根
Day Use
YesDay-use bathing runs 13:00 to 18:00 Friday through Tuesday, but shifts to 15:00 to 18:00 on Wednesday and Thursday, when the bath is closed 10:00 to 15:00 for cleaning.
Adult day-use bathing is 1,600 yen (elementary-school children 700 yen, preschoolers free); towel rental for preschoolers costs extra (face towel 100 yen, bath towel 200 yen). An optional set with an a la carte lunch and the bath is 2,500 yen, served 12:00 to 14:00 (last order 13:30), and it can't be reserved in advance.
Bathing & Water
Uses natural hot spring water
Site states circulation-with-overflow (放流循環併用式), not full kakenagashi except in some guest-room baths.
Open-air outdoor bath
Enclosed indoor bathing area
Dry heat sauna room
Capabilities
Private bath available for day-use visitors or hotel guests to reserve
Ikyu's listing mentions 'private rotenburo rooms', but that refers to specific guest rooms with their own bath (ROOM_ONSEN), not a separately reservable communal private bath; yukoyuko explicitly states no family/kashikiri bath.
Private onsen bath in guest rooms, for overnight guests only
Shared bathing area for all genders
Policies & Services
Allows entry with visible tattoos
Welcomes children and families
Diapered infants allowed briefly with prior toileting; standard Kanagawa rule bars opposite-sex bathing from age 7.
Restaurant or dining open to visitors (not just hotel meal plans)
Shower, wash stations, soap and shampoo provided
Towels available to rent or borrow
Relaxation space for after bathing
On-site or nearby parking available
Views
MountainsLoading map…
Reserve or check availability on a booking site.
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Last updated July 30, 2026