Godzilla, King of the Monsters! is a 1956 kaiju film directed by Terry O. Morse and Ishirō Honda, with special effects by Eiji Tsuburaya. It is a heavily re-edited American localization, or "Americanization", of the 1954 Japanese film Godzilla. The film was a Japanese-American co-production, with the original footage produced by Toho Co., Ltd., and the new footage produced by Jewell Enterprises. The film stars Raymond Burr, Takashi Shimura, Momoko Kōchi, Akira Takarada, and Akihiko Hirata, with Haruo Nakajima and Katsumi Tezuka as Godzilla. In the film, an American reporter covers a giant reptilian monster's attack on Japan.

Kaiju is a Japanese term that is commonly associated with media involving giant monsters. A subgenre of science fiction, it was created by Eiji Tsuburaya and Ishirō Honda. The term can also refer to the giant monsters themselves, which are usually depicted attacking major cities and battling either the military or other monsters.