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 monster characters Godzilla and King Ghidorah, and stars Kōsuke Toyohara, Anna Nakagawa, Megumi Odaka, Katsuhiko Sasaki, Akiji Kobayashi, Yoshio Tsuchiya, and Robert Scott Field, with Kenpachiro Satsuma as Godzilla and Hurricane Ryu as Ghidorah and his cyborg form Mecha-King Ghidorah. 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 from being infected by the Anti-Nuclear Energy Bacteria (ANEB). Meanwhile, science fiction author Kenichiro Terasawa learns of a group of Japanese soldiers stationed on Lagos Island during the Gilbert and Marshall Islands campaign; where they were threatened by American forces, before being saved by a mysterious dinosaur, Godzillasaurus, which Terasawa theorizes to have mutated into the first Godzilla due to nuclear notes on the island.. Powerful businessman and veteran, Yasuaki Shindo, who commanded the Lagos Garrison, confirms Godzillasaurus' existence.