Unshō Ishizuka (石塚 運昇, Ishizuka Unshō, May 16, 1951 – August 13, 2018) was a Japanese actor, voice actor, narrator and theatre director from Katsuyama, Fukui. He was affiliated with Aoni Production at the time of his death and was known for providing the voice of both the narrator and Professor Oak on the Japanese anime series Pokémon. In addition to that, he regularly appeared in both the Japanese and English-language versions of the Pokémon anime, voicing Onix, Steelix and numerous other Pokémon. On August 17, 2018, it was reported that Ishizuka had died on August 13 due to esophageal cancer.