Godzilla Vs. Gigan/Fun Facts

The original script for this film was entitled "King Ghidorah's Great Counterattack" (Kingu Gidora no Daigyakushû), which featured Godzilla, Rodan and Varan fighting Ghidorah, Gigan, and a new monster named Mogu. It was then reworked into the more appealing "Godzilla Vs. The Space Monsters: The Earth Defense Command" (Gojira tai Uchû Kaijû: Chikyû Bôei Meirei). The script pitted Godzilla, Angilas, and Majin Tuol (a giant stone idol, similar to Daimajin) against King Ghidorah, Gigan, and Megalon, all three recruited by an evil alien brain called Miko. This second script was ultimately reworked into the film it is today. The Godzilla Tower, originally from the script, was part of a world fair amusement park, and was not made for an evil purpose like in the final film (in one scene, Gigan actually mistook it for the real Godzilla!). Megalon finally made his debut in Gojira tai Megaro (1973), and Majin Tuol was reworked into King Shisar in Gojira tai Mekagojira (1974).

This was the final appearance for King Ghidorah in a Showa era film. He later would return with a different look in _Gojira VS Kingugidora (1991)_.

As a cost-saving measure, stock footage from _San daikaijû: Chikyu saidai no kessen (1964)_, Kaijû daisenso (1965), Kaijû sôshingeki (1968) and other films were incorporated into the film (these films feature scenes of Godzilla, King Ghidorah and Angilas). Also the entire score of the film was composed of a re-used Akira Ifukube scores from numerous Toho Sci-Fi pieces.

This was the first film in which Godzilla actually drew blood. It first happens during the big battle later in the film when Gigan flies over past Godzilla and swipes his shoulder, and later, when Gigan repeatedly strikes a severely weakened Godzilla in his forehead.