From Wikipedia, the free encyclopedia Tesshō Genda (玄田 哲章 Genda Tesshō?, born May 20, 1948 in Okayama Prefecture) is a Japanese voice actor. He is employed by the talent management firm 81 Produce. When he debuted, he used his real name, Mitsuo Yokoi (横居 光雄 Yokoi Mitsuo?) as artist name. Because he had experience with ballet, he was known by the nickname Pirouette Genda. Along with such well-known voice actors such as Akio Ōtsuka, Shigeru Chiba and Kōichi Yamadera, Genda is one of Japans most prolific voice actors, with 234 roles credited to his name as of September 25, 2007. Among his other credits, he has performed the roles of Masami Iwaki (Dokaben), Suppaman (Dr. Slump), Gō Reietsu (High School! Kimengumi), Optimus Prime (A.K.A.