Steel Jeeg , also known as Kotetsu Jeeg or Koutetsu Jeeg, is a Japanese mecha anime series created by manga artists Go Nagai and Tatsuya Yasuda and produced by Toei Doga, directed by Masayuki Akehi. It was first broadcast on NET in Japan from October 5, 1975, to August 29, 1976, lasting for 46 episodes. Steel Jeeg also ran as a manga in several children's publications, with the original manga was first serialized in Kodansha's TV Magazine from August 1975 to June 1976.

Kiyoshi Nagai , 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 popular 1970s manga and anime series such as Cutie Honey, Devilman, and Mazinger Z. He is credited with creating the super robot genre; designing the first mecha robots piloted by a user from within a cockpit with Mazinger Z; as well as helping pioneer the magical girl genre with Cutie Honey; the post-apocalyptic manga/anime genre with Violence Jack; and the ecchi genre with Harenchi Gakuen. In 2005, he became a Character Design professor at the Osaka University of Arts. He has been a member of the Tezuka Osamu Cultural Prize's nominating committee since 2009.