Invasion of Astro-Monster is a 1965 kaiju film directed by Ishirō Honda, with special effects by Eiji Tsuburaya. It is the sixth film in the Godzilla franchise and Shōwa period. The film was a Japanese-American co-production; it was the second collaboration between Toho Co., Ltd. and UPA. The film stars Akira Takarada, Nick Adams, Kumi Mizuno, Akira Kubo, and Yoshio Tsuchiya, with Haruo Nakajima as Godzilla, Masaki Shinohara as Rodan, and Shoichi Hirose as King Ghidorah. In the film, aliens plead with humanity to borrow Godzilla and Rodan to defeat King Ghidorah, only to betray the humans and unleash the monsters on the Earth.

Ishirō Honda was a Japanese filmmaker who directed 46 feature films in a career spanning five decades. He is acknowledged as the most internationally successful Japanese filmmaker prior to Hayao Miyazaki and one of the founders of modern disaster film, with his films having a significant influence on the film industry. Despite directing many drama, war, documentary, and comedy films, Honda is best remembered for directing and co-creating the kaiju genre with special effects director Eiji Tsuburaya.