Hisashi Katsuta (勝田 久, Katsuta Hisashi) was a Japanese actor and voice actor. He is best known for his voice-over portrayal of Professor Ochanomizu in three anime adaptations of the Astro Boy franchise, and also voiced Dr. Hoshi in Astroganger (1972–1973), Professor Tobishima in Groizer X (1976–1977), and Shin'ichirō Izumi in Tōshō Daimos (1978–1979).