Choushinsei Flashman (超新星フラッシュマン, Chōshinsei Furasshuman; Supernova Flashman) is a Japanese television show broadcast on TV Asahi from 1986 to 1987. It was the tenth instalment in the Super Sentai metaseries produced by Toei Company, replacing Dengeki Sentai Changeman. It ran for 50 episodes before it was replaced by Hikari Sentai Maskman.

Yutaka Izubuchi designed all the characters in the series. He would return to design characters for Tokumei Sentai Go-Busters.

In 1966, five infants are abducted by an alien group known as the Alien Hunters on behalf of the Reconstructive Experiment Empire Mess, which seeks human subjects for experimentation. The children are rescued by Mess’s enemies, the Flash alien race, who take each child to a different planet within their solar system for training.

There, each is raised separately and trained in a range of superhuman abilities, with their bodies adapting to the planets’ environments and gaining unique powers. When they return to Earth in 1986 to confront Mess—now attempting to invade—they also take the opportunity to search for their biological parents.

Raised in the harsh conditions of Planet Flash and its four moons, gaining powers in the Flash Star System, the eponymous Flashmen was brought up for the purpose of defeating Mess. The team can perform team attacks like the Combination Super Spear, a large energy spear created from the combined powers of the Flashmen.

The Reconstructive Experiment Empire Mess (改造実験帝国メス, Kaizō Jikken Teikoku Mesu) is a space-traveling alien empire that takes over planets, using their lifeforms as raw materials in its experiments. Their goal is to transform its leader Lah Deus into the strongest being in the universe through repeated bio-augmentation. The Reconstructive Experiment Empire Mess' base of operations is the UFO-like spaceship called Labo.

The Beast Warriors (獣戦士, Jūsenshi) are Chimera-based monsters that are created by Great Doctor Lie Köpflen through his DNA synthesizer.