The film was one of many early Japanese monster films quickly produced after the success of Toho's Godzilla (1954) in 1954. The film was loosely based on a novel by Gentaro Nakajima.
The U.S. English dubbed version titled "Warning From Space" (1956) is quite faithful to the original Japanese version. However, at the final fade-out an additional sequence is added showing Ginko (Toyomi Karita) transforming from the human form back to the Pairan form. They simply took the transformation sequence, showing Ginko transforming into the human form, from earlier in the film and printed it in reverse.