Fukiage open air hot spring
The rock bath is the only place in the wilderness. A hidden hot spring for hot spring lovers to enjoy at their leisure.
Known as a popular film location, this free open-air bath is quietly located in the virgin forest on the side of Mt. Tokachi. The baths are open 24 hours a day, so some people bathe late at night with a flashlight in hand, and everyone enjoys the secluded hot spring freely. The source of the spring water flowing down the cliff, the crisp air of the virgin forest, and the chirping of wild birds. When you soak in these natural open-air baths, your daily stress disappears. It is a mixed bathing area, but bathing in swimsuits is allowed, so you can wear swimsuits or towels before entering.
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https://www.kamifurano.jp/exlang/hotels/fukiage-open-air-hot-spring/?lng=en
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上富良野町吹上温泉
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