Kiyoshi Nagai (永井潔 Nagai Kiyoshi, born September 6, 1945 in Wajima, Ishikawa), better known by the penname Gō 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. 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.
Wow, I knew that the original Violence Jack was a quasi-sequel to Devilman, but I had no idea that Shin Violence Jack was more of a direct continuation of the story. Even though the ending doesnt make any sense to me (more volumes? bad translation?) this is definitely worth your time if youre a fan of Devilman or Go Nagai, if you can track it down. Don't believe this one was licensed in the US, making it that much harder to find, and makes me appreciate his work even more.