is a 1991 Japanese kaiju film written and directed by Kazuki Ōmori and produced by Shōgo Tomiyama. Distributed by Toho and produced under their subsidiary Toho Pictures, it is the 18th film in the Godzilla franchise, and is the third film in the franchise's Heisei period. The film features the fictional monster characters Godzilla and King Ghidorah, and stars Kōsuke Toyohara, Anna Nakagawa, Megumi Odaka, Katsuhiko Sasaki, Akiji Kobayashi, Yoshio Tsuchiya, and Robert Scott Field. The plot revolves around time-travelers from the future who convince Japan to travel back in time to prevent Godzilla's mutation, only to reveal their true motives by unleashing King Ghidorah onto the nation.

Plot

Two years after his battle with Biollante, Godzilla is still weakened after being infected by the ANEB (Anti-Nuclear Energy Bacteria). Meanwhile, science fiction author Kenichiro Terasawa is writing a book about the monster and learns of a group of Japanese soldiers stationed on Lagos Island during the Gilbert and Marshall Islands campaign. In 1944, while threatened by American forces, the Japanese soldiers were saved by a mysterious dinosaur, Godzillasaurus, which Terasawa theorizes was subsequently mutated into the first Godzilla in 1954 after a hydrogen bomb test on the island. Yasuaki Shindo, a wealthy businessman and army veteran who commanded the Lagos Garrison, confirms that Godzillasaurus did indeed exist.