後生掛温泉ごしょうかけおんせん
Seven-style bath hall in a lone ryokan on Hachimantai plateau
Cash only. Guests who check in early/late can use day-use bath at a discounted 500 yen with a coupon from the front desk.
Uses natural hot spring water
Open-air outdoor bath
Enclosed indoor bathing area
Sauna room of any kind
Shared bathing area for all genders
Allows entry with visible tattoos
Tattoos must be completely covered with tattoo cover stickers.
Welcomes children and families
Children under school age cannot stay overnight. No day-use age restriction stated.
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
Goshogake Onsen (後生掛温泉, ごしょうかけおんせん) sits alone in the Hachimantai National Park at around 1,000 meters, with steam rising from the volcanic valley behind it. The large bath hall has seven distinct bath types: a mud bath (doroyu, 泥湯), a box steam bath (hakamushi-yu, 箱蒸し湯) where you sit enclosed while steam fills the cabinet, an open-air bath, an indoor bath, a waterfall bath (utaseyu, 打たせ湯), a steam sauna, and an aerated tub. All are kakenagashi (かけ流し), kept flowing fresh from the source. The water is cloudy and grayish with a sulfur smell. A separate ondol (温熱床, geothermal heated-floor room) is available by reservation for a longer warm-down. The inn itself has appeared in manga by Tsuge Yoshiharu and in the film "Thermae Romae II".
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Last updated September 19, 2026