Terror of Mechagodzilla, released in Japan as Mekagojira no Gyakushū (メカゴジラの逆襲, lit. Mechagodzilla's Counterattack) is a 1975 Japanese kaiju film directed by Ishirō Honda, written by Yukiko Takayama, and produced by Tomoyuki Tanaka and Henry G. Saperstein, with special effects by Teruyoshi Nakano. The film was produced and distributed by Toho; it is the 15th film in the Godzilla franchise, serving as a direct sequel to the 1974 film Godzilla vs. Mechagodzilla, and is the final film in the franchise's Shōwa period. Terror of Mechagodzilla stars Katsuhiko Sasaki, Tomoko Ai, Akihiko Hirata, and Gorō Mutsumi, and features Toru Kawai, Kazunari Mori, and Tatsumi Nikamoto as the fictional monster characters Godzilla, Mechagodzilla 2, and Titanosaurus, respectively. The film was released theatrically in Japan on March 15, 1975. It received a limited release in the United States in 1978 by Bob Conn Enterprises under the title The Terror of Godzilla. The film remains the least financially successful entry in the Godzilla franchise to this day.