Kiyoshi Nagai (永井潔, Nagai Kiyoshi?, born September 6, 1945 in Wajima, Ishikawa), better known by the penname Go Nagai (永井 豪, Nagai Gō?), 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 in the 1970s. 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.