The show famously included Godzilla as a recurring guest character, but also Godzilla villains King Ghidorah and Gigan, and a number of episodes were directed by Toho feature film directors Ishirō Honda and Jun Fukuda. The show began broadcasting on Nippon Television on April 2, 1973, but despite its pedigree, only lasted 26 episodes before cancellation.
Zone Fighter, or Ryūsei Ningen Zone (literally “Meteor Human Zone”), tells the story of the Zone family, fugitives from the destroyed planet of Peaceland who fled to Earth and disguised themselves as the Sakimori family. However, the aliens who destroyed their planet, the Garogans, have come to Earth, and the Sakimori children, take up the fight to save their adopted planet.
The primary hero is the eldest son Hikaru Sakimori, who can transform into the masked Zone Fighter by shouting “Zone Fight Power!” He can additionally transform into a gigantic 62 meter (204 ft.) tall form by shouting “Zone Double Fight!” His sister, Hotaru Sakimori, can transform into Zone Angel, and their kid brother Akira Sakimori, can turn into Zone Junior. Neither Angel or Junior could become gigantic. Their dad, Yochiro Sakimori, is an inventor who works for a toy research institute, providing the heroes with various gimmicks and weapons.
Zone Fighter himself takes obvious design cues from Ultraman, but with a predominantly silver and blue color scheme with red trim. Abilities include flight, defensive and offensive energy projection, grappling, wrist-mounted missiles, and even teleportation. Like contemporary giant heroes, he has a time limit on his giant form before he runs out of energy. And like the Ultras, Zone Fighter is not a robot, but a dude who can get huge.
The Garogas are skull-faced aliens who aren't huge either. Instead, they launch their dreaded terror-beasts from space to Earth in rocket pods, like a kaiju ODST. The terror beasts are usually giant monsters or cybernetic mixtures of monsters with various metal parts bolted onto them.
One of the terror-beasts, Jikiro is a full robot. Appearing in the second episode, Jikiro is launched to Earth to attack a weakened Zone Fighter, and nearly succeeds in killing him. Jikiro is a 78 meter (256 ft) tall metal monster with a hunchbacked, reptilian head and magnetic powers. It also has an adorable parachute that deploys after he hits atmosphere, allowing him to land safely.
Being a monster-of-the-week, Jikiro was destroyed, but he was rebuilt later in the series as Super Jikiro, with more powerful armor and weapons before being destroyed once more.
Zone Fighter is an interesting side story of the Showa-era Godzilla franchise. Cancelled amidst poor ratings and an oil crisis, it nevertheless exists as an official part of Godzilla continuity taking place after Godzilla Vs. Megalon. After fleeing Earth, Gigan was captured by the Garogas and used to attack Earth, and he was killed by Zone Fighter. There were a few manga that ran alongside the show, but after its run the show drifted into obscurity.
Curiously, in 2015, the YouTube channel Daikaiju Legends began a fan project/sequel series to Zone Fighter (called Zone Fighter) which uses American actors for the human cast and stop-motion action figures to represent the monsters and heroes including Zone Fighter and a bunch of Ultraman characters. Its odd, and the acting leaves no question that its a fan-film, but the stop motion effects are an interesting workaround to not having suit actors and miniature city sets, and the production quality jumped several levels of sophistication in the intervening five years.
Next time on Shin Super Robot Sunday: Senkosha Productions goes from a King to a Baron.
Sources
https://en.wikipedia.org/wiki/Zone_Fighter
https://ja.wikipedia.org/wiki/%E6%B5%81%E6%98%9F%E4%BA%BA%E9%96%93%E3%82%BE%E3%83%BC%E3%83%B3
https://wikizilla.org/wiki/Zone_Fighter
https://wikizilla.org/wiki/Zone_Fighter_(series)
https://godzilla.fandom.com/wiki/Zone_Fighter_(Series)
https://www.tohokingdom.com/kaiju/tv/jikiro.html#jikiro
https://fan-made-kaiju.fandom.com/wiki/Zone_Fighter_(Daikaiju_Legends_series)