Isao Sasaki (ささき いさお, Sasaki Isao?, May 16, 1942–) is a Japanese seiyū, actor, and vocalist. He has had voice roles in anime such as Legend of the Galactic Hero, Space Battleship Yamato, and Gatchaman. He has also performed the opening themes for anime such as Yamato, Star of the Giants, Getter Robo, Casshan, Grendizer, Gaiking and tokusatsu series such as Himitsu Sentai Goranger, J.A.K.Q. Dengekitai, Choujinki Metalder, and most recently Tokusou Sentai Dekaranger. He has also had an acting role in the tokusatsu film Kamen Rider ZO and in the series Kyojuu Tokusou Juspion.