Gojira tai Megaro
The undersea nation of Seatopia sends the gigantic Megalon to destroy the world above - and it's up to Godzilla and a size-shifting robot, Jet Jaguar, to defeat him.
Haruo Nakajima, Hiroyuki Kawase, Katsuhiko Sasaki, Kenpachiro Satsuma, Robert Dunham, Yutaka Hayashi