Mothra

The film was based on a short fantasy novel called "The Luminous Fairies and Mothra" (Hakko Yosei to Mosura). Toho commissioned the story, wanting to appeal to a female audiences since Toho president/producer Iwao Mori found that women made up a large portion of the movie-going public and would often bring people along with them. Writers Takehiko Fukunaga, Shin'ichirô Nakamura, and Yoshie Hotta each wrote part of the original story which was then adapted by screenwriter Shin'ichi Sekizawa into the final film. The film was a hit at the box office and became one of Toho's most successful fantasy films, with Mothra becoming a popular character who would star alongside Godzilla as well has her own film series decades later.

When Dr. Shinichi is showing the symbols he discovered in the cave to Senchan, you can see someone in black pants and shoes walking down the stairs behind Senchan's head.

In the credits for the U.S. version, including promo material released by Columbia Pictures, Eurasian model Jerry Ito (who plays the villianous Mr. Nelson) is billed as "Jelly Ito."

The American Version also edited the birth of Mothra sequence, cutting out a good 40 seconds to make it more elaborate

Edited into Invasion of Astro-Monster (1965)