Go NagaiGo Nagai is a Japanese manga artist whose work helped change the direction of modern manga and anime. He debuted in the late 1960s and became known for stories that were darker, more intense, and aimed at older readers than most comics of the time. Hs major works include Devilman, Mazinger Z, and Getter Robo, created with Ken Ishikawa. Mazinger Z introduced the idea of a piloted giant robot, which became a standard of the mecha genre, while Devilman brought tragedy and moral conflict into mainstream action manga.