(from Manga Shop):
The Japanese "Superman" has appeared!! Four popular mangaka have done manga adaptations of this monumental work of Japanese tokusatsu works, all nine of which were released in theaters in 1957!!

The Super Giants have come from distant space! What kind of adventures await them? These heroes, the "Super Giants", protect the earth from evil aliens. In 1957, at the dawn of the Japanese tokusatsu film industry, the first movie, Steel Giant, was released in theaters .

In addition, in conjunction with the theatrical release, Kodansha's "Bokura" manga adaptations by Jiro Kuwata and Daiji Kazumine convey the charm of this work to the fullest with their beautiful touches. Following theirs, Tatsuo Yoshida's led to the development of an manga-original story.