Isahaya Park is in Isahaya in Nagasaki Prefecture, Japan. It was built on the ruins of Isahaya castle 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" over the pond. The park is about 50 minutes by bus from Nagasaki city.