Oigami Onsen Tomei-kan
老神温泉 東明館おいがみおんせん とうめいかん
Riverside ryokan with sulfur spring water and gyoza
Day Use
YesTemporary closures may occur due to interior renovation work (example: Oct 26 to Nov 19, 2024, overnight stays available except part of the 3rd floor; Nov 20, day-use bathing closed from 10:00 AM).
Adults ¥700; children ¥450; infants ¥350; 6-ticket book (adults) ¥3,500. Last entry 19:00.
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
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
RiverAbout
Tomeikan (東明館) sits by the river in Oigami Onsen (老神温泉), Gunma. The baths use 100% free-flowing (kakenagashi, 源泉かけ流し) spring water: the indoor bath has a faintly cloudy, sulfurous tint, while the outdoor bath runs clear. Both men's and women's sides have an indoor bath and a rotenburo (open-air bath). The ryokan is operated by Gyoza no Manshu (ぎょうざの満洲), a well-known gyoza chain, and has a Chinese restaurant on-site.
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Last updated September 19, 2026