Space Ironmen Kyodain (宇宙鉄人キョーダイン Uchū Tetsujin Kyōdain) is a Japanese tokusatsu science fiction superhero TV series. It premiered in 1976 and ran for 48 episodes.
An alien empire called the "Robot Army Corps" kidnap a human scientist, Dr. Hayama, and two of his three sons. He's forced to improve their technology. He has to go along with them despite being angry and resentful and feeling guilt over it.
One year later when the empire is sufficiently advanced, the Robot Army Corps plan to invade Earth. However, the invasion is surprisingly stopped by two robots. It is revealed that Dr. Hayama programmed the personalities of his two kidnapped sons into those super-powered robots to stop the Robot Army and also to look after his youngest son. His older robot-sons Jouji and Ryuji, now called "Skyzel" ("sky" for sky) and "Granzel" (zel for "ground"), have super strength and can transform into a jet and a car. They try to fulfil their father's wishes and honour his legacy.
Available on YouTube as part of Toei's Tokusatsu World Channel.
The series provides examples of the following tropes:
- Brain Uploading: Skyzel and Granzel are robots implanted with the minds of Jouji and Ryuji. Even though they're copies, they act like and identify themselves as the originals. They even have screens inside their heads that can display their human faces.
- Imagine Spot: There are often scenes in which Kenji sees Skyzel and Granzel doing something funny and then imagining/remembering his original brothers doing the same thing, with the scene cutting to the brothers acting as themselves.
- Robot Buddy: Gonbesu GA-49. It separates into two parts - its head, like a flying saucer, and its body, which resembles a huge bowling ball - when fleeing or attacking an enemy.
- Shout-Out: The planet Dada is a shout-out to the art movement of the same name, as the series is described as having a very odd design, reminiscent of Dada art.
- Spiritual Successor: Kyodain premiered in the months following the conclusion of Kamen Rider Stronger ended the first televised run of the Kamen Rider and so was produced as a "post-Kamen Rider" show, airing on TBS as Stronger did while Himitsu Sentai Gorenger continued on NET.