It was a collaboration in Weekly Shōnen Magazine by science fiction writer Kazumasa Hirai and manga artist Shotaro Ishinomori.

They are gathered by Vega, an alien cyborg warrior, and Luna, the princess of Transylvania, who have discovered the presence of Genma traveling towards the Earth with the intention to conquer it.

In order to stop him, Luna and Vega train Azuma and all the other psychics to defeat Genma and thwart his destructive plans.

In a new version of 1979, Jō Azuma, now an adult paranormal researcher and writer, is hired by a powerful woman known as Moonlight to expose the existence of psychics to the world.

However, said woman, Non, manages to run away with the resultant children, two male twins named Loof and Jin, who swear to stop their father.

A young version of Jō discovers in 1967 he has psychic powers which predict the coming of Genma, so he initiates a resistance movement from his school's literature club, named "Genken".

[10] Capcom artist and designer Akira Yasuda said the initial inspiration for Chun-Li in the fighting game Street Fighter II (1991) came from the anime film Harmagedon: Genma Wars.

It has been released in the US under the name Genma Wars by Media Blasters on DVD, later re-released in a box set of the entire series.

The release experienced controversy, as the licensor Enoki Films edited some footage to remove panning camera shots of female nudity, but strangely left rape and sex scenes intact.

In one case, in exchange for the safety of her village, a girl called Non submit to the Maoh King, and give birth to male twins, Loof and Jin.

Data East produced a laserdisc video game as a tie-in to the animated movie, entitled Genma Taisen in Japan[13][14] and Bega's Battle in North America.

[3] In the game, the player takes on the role of the robot Bega (Vega) whose goal was to stop the invasion forces of the alien Varga (Genma), while also rescuing his three friends who have been kidnapped by them.

[17] The Twin Galaxies world record for Bega's Battle was set by Steve Harris (later the founder of Electronic Gaming Monthly) on July 18, 1983.

[18] In Japan, Game Machine listed Bega's Battle on their November 1, 1983, issue as being the third most-successful upright arcade/cockpit unit of the month.