Isao Sasaki

Isao Sasaki is a Japanese voice actor, actor, and vocalist. He has had voice roles in anime such as Legend of the Galactic Heroes, Space Battleship Yamato, and Gatchaman. He has also performed the opening themes for anime such as Yamato, Star of the Giants, Getter Robo, Casshern, Grendizer, Gaiking and tokusatsu series such as Himitsu Sentai Gorenger, 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, OOO, DenO, All Riders Lets Go Kamen Riders and in the series Kyojuu Tokusou Juspion. He is the dub voice of Clark Kent and Superman in the film series, until he was replaced by Hiroki Touchi for Superman Returns.

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Source: Wikipedia