Oominekan
大峰館おおみねかん
Small kakenagashi ryokan with indoor and open-air baths in Kamimoku Onsen
Day Use
Yes1,000 yen per person. Reception open 11:00 to 17:00, closes at 18:00. On Wednesdays, opens around 13:00.
Bathing & Water
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Bathing Arrangements
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
Highlights
Drinking SpringAbout
Ominekan (大峰館) has been running since 1955 in Kamimoku Onsen (上牧温泉), a quiet hot-spring village in Minakami, Gunma. The inn draws water directly from its own spring on the premises and keeps it flowing fresh into the baths without heating or diluting, so what you get in the tub is the spring as it comes up. The water is clear and noticeably soft on the skin. There are both indoor baths and open-air rotenburo (露天風呂), each in separate men's and women's sections. Unusually, the spring holds a drinking permit, and the inn sets out a spot by the entrance where you can sip it straight from the source, plus chilled spring water in the post-bath lounge.
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Last updated September 19, 2026