Ryuudo
湯めぐりテーマパーク 龍洞ゆめぐりテーマパーク りゅうほら
Eighteen private outdoor baths at a dragon-themed ryokan in the Gunma mountains
Day Use
YesAdult 2,500 yen; child (elementary and under) 1,500 yen; 4-hour stay limit applies
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Bathing Arrangements
A private bath you can reserve for yourself or your group
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
On-site or nearby parking available
Views
River
MountainsHighlights
Cave BathAbout
Ryuudo sits at 800 meters in a secluded valley of Minakami, Gunma, with 18 individually named private outdoor baths scattered across the grounds. Every bath runs on fresh spring water (kakenagashi) and is locked from inside, so you just grab a wooden nameplate, pick whichever bath is free, and stay as long as you like. The water is clear and smooth on the skin. Baths range from a large riverside rotenburo and a cave bath to a cypress tub, a sauna-equipped bath, and rooms with their own private terrace pools. A stamp rally lets you work through all 18. The shared rest building, Yu-yu-kan (遊湯館), is a farmhouse from the Meiji era, with an open hearth where you can warm up between rounds.
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Last updated September 19, 2026