Watanoyu Annex
草津ホテル別館 綿の湯
Lodging
Bathing & Water
Natural onsen water
Uses natural hot spring water
Outdoor BathNo
Open-air outdoor bath
Indoor BathYes
Enclosed indoor bathing area
SaunaYes
Dry heat sauna room
Cold BathYes
Cold water plunge bath, typically used after sauna
Capabilities
Mixed BathingNo
Shared bathing area for all genders
Policies & Services
TattooNo
Allows entry with visible tattoos
KidsNo
Welcomes children and families
Guests must be junior-high age or older; young children cannot stay.
Rest AreaYes
Relaxation space for after bathing
ParkingYes
On-site or nearby parking available
Views
Mountains
RiverHighlights
Foot BathLoading map…
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Last updated August 5, 2026