Hotel Green Plaza Karuizawa
ホテルグリーンプラザ軽井沢
Family resort hotel with a rock-cave onsen bath
Lodging
Bathing & Water
Natural onsen water
Uses natural hot spring water
Outdoor BathYes
Open-air outdoor bath
Indoor BathYes
Enclosed indoor bathing area
SaunaYes
Sauna room of any kind
Policies & Services
KidsYes
Welcomes children and families
DiningYes
A restaurant or dining room open to visitors, not only meals for overnight guests
Highlights
Cave BathAbout
This large resort hotel has an onsen bathhouse with an open-air rotenburo, an indoor bath and a sauna, plus a rock-cave bath that guests single out as a highlight. The hotel leans into families: it's certified welcome-baby friendly, and the bath is kept shallow and on the cool side so small children can bathe with their parents. Four restaurants round out the stay.
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Last updated September 29, 2026