Since the Toei Company requested a plot for a tokusatsu TV series from Yokoyama, he wrote this manga. Yokoyama made the setting “Giant Robo follows only a hero” as a differentiation from his other character, Tetsujin 28, a giant robot which everyone can control. GR: Giant Robo (GR ジャイアントロボ GR: Jaianto Robo) is an animated TV series written by Chiaki Konaka (Serial Experiments Lain, The Big O) and directed by Masahiko Murata (Jinki:EXTEND, Mazinkaiser). The TV series is a re-imagining of Mitsuteru Yokoyama‘s manga and was created to commemorate Giant Robo’s 40th anniversary.
GR premiered January 19, 2007. The series finished its run on July 6 of the same year, totaling 13 episodes, with the possibility for two further seasons.