The first film featuring the giant monster known as Godzilla was released nationwide in Japan.

Godzilla is a 1954 Japanese epic kaiju film directed and co-written by Ishirō Honda, with special effects by Eiji Tsuburaya. Produced and distributed by Toho, it is the first film in the Godzilla franchise. The film stars Akira Takarada, Momoko Kōchi, Akihiko Hirata, Takashi Shimura, Sachio Sakai, Fuyuki Murakami, Keiji Sakakida, Toyoaki Suzuki, Tsuruko Mano, Kin Sugai, Takeo Oikawa, Kan Hayashi, Seijiro Onda, and Toranosuke Ogawa with Haruo Nakajima and Katsumi Tezuka as Godzilla. In the film, Japan's authorities deal with the sudden appearance of a giant monster, whose attacks trigger fears of nuclear holocaust in post-war Japan.

Kaiju is a Japanese term that is commonly associated with media involving giant monsters. Its widespread contemporary use is credited to tokusatsu director Eiji Tsuburaya and filmmaker Ishirō Honda, who popularized the kaiju film genre by creating the Godzilla franchise and its spin-offs. The term can also refer to the monsters themselves, which are usually depicted attacking major cities and battling either the military or other creatures.

Godzilla is a monster, or kaiju, that debuted in the eponymous 1954 film, directed and co-written by Ishirō Honda. The character has since become an international pop culture icon, appearing in various media: 33 Japanese films produced by Toho Co., Ltd., five American films, and numerous video games, novels, comic books, and television shows. Godzilla has been dubbed the King of the Monsters, an epithet first used in Godzilla, King of the Monsters! (1956), the American localization of the 1954 film.