Zone Fighter, known in Japan as Ryūsei Ningen Zone, is a tokusatsu science fiction superhero television series. Produced by Toho Company Ltd., the show aired on Nippon Television from April 2 to September 24, 1973, with a total of 26 episodes, and it was canceled due to the oil crisis of 1973. This was Toho's response not only to the popular Ultra Series but also to the Henshin Hero phenomenon initiated by shows like Kamen Rider and Android Kikaider. The previous year, Toho had just launched their successful first superhero show, Rainbowman. The series was also notable for its guest appearance by Toho's own Godzilla, as well as two other Toho monsters, King Ghidorah and Gigan. Supplementary materials published by Toho have confirmed that Zone Fighter is part of the Showa-era Godzilla series, taking place between Godzilla vs. Megalon and Godzilla vs. Mechagodzilla.
