This vast urban park takes its name from the Ainu word "Oniushi," which is also the origin of the town's name. Located along the national highway, it's an ideal rest stop during a drive, and from the adjacent roadside station "YOU Yu Mori," you can enjoy a 360-degree view of the entire park centered around the fountain monument, the beautiful Mount Komagatake, and on clear days, you can see not only Funka Bay, but also Mount Yotei and Mount Usu. The park has unique playground equipment and a lawn plaza, and in the flowering season, about 500 cherry trees delight the eyes of visitors.