Private onsen in Gunma
A bath you have to yourself: no other bathers, and usually no tattoo problem either.
Is there a mixed onsen in Gunma?
Yes: Hoshi Onsen Chojukan, Sainokawara Rotenburo, Shima Tamura, Takaragawa Onsen Osenkaku. If what you want is to bathe together as a couple or a family, a private onsen is usually how it is done in Japan: the 6 below have a bath your group uses alone. Where Japan’s mixed baths are, and what to wear
Otakinoyu
草津温泉 大滝乃湯
Tattoos OK (day visit)Private bath
Jizo-no-yu
地蔵の湯
Policy not published (day visit)Private bath
Kusatsu Onsen Naraya
草津温泉 奈良屋
OK in a private bath (day visit)OK in a private bath (overnight)Private bathDay visits without staying
Kishigon Ryokan
伊香保温泉 岸権旅館
OK in a private bath (overnight)Private bath
Sekizenkan
四万温泉 積善館
OK if covered (day visit)OK if covered (overnight)Private bathDay visits without staying
Shima Tamura
四万温泉 四万たむら
Policy not published (overnight)Private bath