Godzilla vs. Megalon

IMDb 6.2HDG1973

Inventor Goro Ibuki creates a humanoid robot named Jet Jaguar. It is soon seized by an undersea race of people called the Seatopians. Using Jet Jaguar as a guide, the Seatopians send Megalon as vengeance for the nuclear tests that have devastated their society.

Country: Japan
Genres: Action, Adventure, Science Fiction
Released: 1973-03-17
Directors: Jun Fukuda
Productions: TOHO, Toho Eizo Bijutsu, Tokyo Laboratory
Casts: Katsuhiko Sasaki, Yutaka Hayashi, Hiroyuki Kawase, Kanta Mori, Kotaro Tomita