is a Prefectural Natural Park in southwest Hokkaidō, Japan. Established in 1960, the park spans the municipalities of Esashi, Kaminokuni, Okushiri, Otobe, Setana, and Yakumo. Notable islands within the park include Okushiri Island and Kamome Island.
References
External links Map of Natural Parks of Hokkaidō Map of Hiyama Prefectural Natural Park