母畑温泉 八幡屋
Rock-carved open-air baths and a panorama rotenburo above the hills
Day-use bathing is by phone reservation only, for two or more guests, and is not available December 31 to January 3.
Uses natural hot spring water
Enclosed indoor bathing area
Shared bathing area for all genders
Allows entry with visible tattoos
Tattoos are fine if fully covered with a waterproof sticker (sold at the gift shop); otherwise the main baths are off-limits and a paid private bath is offered instead.
A restaurant or dining room open to visitors, not only meals for overnight guests
On-site or nearby parking available
Bobata Onsen Yahataya is a large ryokan whose indoor and open-air baths are cut into huge stone brought from Fujian, China: the men's rotenburo is a single block about 8 meters long, the women's a set of three smaller stones. The indoor bath sits under a high, open atrium ceiling. The alkaline spring water is known locally as bijin-no-yu (美人の湯), or beauty water, for how smooth it leaves the skin. A separate annex has panorama open-air baths on its upper floors looking over the surrounding hills and forest, with the men's and women's floors swapping monthly, plus four private kashikiri baths with framed window views. The sauna area has both a hot sauna and low, lying-down rooms on heated bakuhanseki stone and in radon-infused steam.
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Last updated September 29, 2026