Cyborg 009 (1966 film)
Shortly before the film's release, as the Cyborg 009 feature moved to Weekly Shonen Magazine, Ishinomori had to draw up a new origin story for film viewers who would be reading the magazine, although it was not intended to be canon with the upcoming Underground Empire of Yomi arc. This story, "Prologue", was a brief origin story taking cues from some parts of this film.