Isahaya Park (also known as Azalea Park) is in Nagasaki Prefecture, Japan. It was built on the ruins of Isahaya castle (also known as Takashiro) during the Taishō period. The park is famous for its azalea blooms, and the "Azalea Festival" is held here, on and around April 10 every year. The park is also known for its "Spectacles Bridge" (see below) over the pond.