Kiyoshi Nagai (永井潔 Nagai Kiyoshi, born September 6, 1945), better known by the pen name Go Nagai, is a Japanese manga artist and a prolific author of science fiction, fantasy, horror and erotica. He made his professional debut in 1967 with Meakashi Polikichi, but is best known for creating Cutie Honey, Devilman, and Mazinger Z. He also pioneered the ecchi genre with Harenchi Gakuen. He is credited with creating the Super Robot genre and for designing the first mecha robots piloted by a user from within a cockpit with Mazinger Z. In 2005, he became a Character Design professor at the Osaka University of Arts. Since 2009, he is a member of Tezuka Osamu Cultural Prize's nominating committee.