'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.

With the help of marine biologist Akira Ichinose, they trace Titanosaurus to a reclusive, mad scientist named Shinzô Mafune, who wants to destroy mankind.

While the group visits Mafune's old home, they meet Mafune's daughter, Katsura, who secretly reveals to be a cyborg, previously having undergone cybernetic surgery and implanted with Mechagodzilla's control device after she was injured during one of her father's experiments when she was young, and claims her father is dead and that she burned his notes about Titanosaurus at his request.

Mugal offers the Simeons' services to Mafune so that their respective monsters can wipe out mankind and allow them to rebuild the world for themselves.

Complicating matters, Ichinose falls in love with Katsura and unwittingly gives her Interpol's information on the Simeons, Mechagodzilla, and Titanosaurus.

Another noticeable change to the script is that of the final battle, which does not move to the countryside but instead would have reduced Tokyo to rubble during the ensuing conflict between the three monsters.

Before Ishiro Honda agreed to return rumours persist Yoshimitsu Banno was also asked to direct due to Tomoyuki Tanaka being pleased with his work on Prophecies of Nostradamus.

[5] Director Ishiro Honda later lamented not having been able to work with the story's writer, Yukiko Takayama, on other films, enjoying that a "woman's perspective was especially fresh" for the genre.

He notes, though, that Honda never actually assigned any of the shooting to him, possibly because he was happy to be directing again after a long gap in his career and wanted to do the work himself.

[7] The scene occurs when Katsura undergoes an operation to have Mechagodzilla 2's control device placed inside her body, at which point her breasts are exposed.

[11] The film was given a North American theatrical release in March 1978 by independent distributor Bob Conn Enterprises under the title The Terror of Godzilla.

Just as Cinema Shares had done with the previous three Godzilla movies, Bob Conn Enterprises chose to utilize the Toho-commissioned English dub instead of hiring a new crew to re-dub the film.

[12] Henry G. Saperstein, who sold the theatrical rights to Bob Conn Enterprises, also released the film to television in late 1978, this time under Toho's international title, Terror of Mechagodzilla.

Unlike The Terror of Godzilla, the television version remained mostly uncut, with only the shot of Katsura's naked breasts excised.

It was then re-released by Second Classic Media, this time distributed by Genius Entertainment, on November 20, 2007, both individually and as part of the Godzilla Collection box set on April 29, 2008.