Ghidorah, the Three-Headed Monster

The film is noted for beginning the gradual transition of Godzilla's character away from his villainous roots, an idea from producer Tomoyuki Tanaka. While screenwriter Shin'ichi Sekizawa and special effects director Eiji Tsuburaya aided this change by humanizing the monsters and adding more comedy to their antics, director Ishirô Honda opposed it. He was hesitant with the famous monster talk scene but was unable to dispute the studio mandates from Toho. Nevertheless, Honda was troubled by the direction Toho was forcing the series to take, mentioning, "I am concerned that we are drifting toward taking the easy route, believing a silly story line is OK, though it might be mocked by adults simply because the film is made for children. Kids will not tolerate nonsense." Tanaka would come to regret his decision, which he described as a mistake.

When the assassins' 1960 Mercedes 220 S is crushed by the landslide, it changes to a 1963 Toyopet Tiara for the shot of Malmess extracting himself from the wreck.

In the Japanese version, Shindo fires back at Malmess and his thugs in Princess Salno's hotel room. However, the American version deletes Shindo's return of fire.

Edited into Godzilla vs. Gigan (1972)