Motoyoshi Tomioka

Thousands of years ago, Mechagodzilla, a robotic monster, was driven into the sea by Godzilla, Earth's defender. Recently, a submarine was dispatched to locate Mechagodzilla's remains. Overpowered by humans from the Third Planet, the scholar Dr. Mafune is forced to control two monsters through experiments and inventions in order to conquer Earth. However, when Mechagodzilla is ordered to destroy a ship, a fierce battle ensues.

A submarine expedition to salvage the remains of Mechagodzilla is thwarted by a massive dinosaur named Titanosaurus. An Interpol investigation leads biologist Ichinose to uncover the work of Dr. Mafune and his mysterious daughter Katsura. Aligned with the Black Hole Aliens, Katsura's life becomes entwined with the resurrected machine.

Ichiro Miki is a child living in the industrial district of Kawasaki, where his parents' constant struggle to make ends meet often leaves the schoolboy alone. Constantly teased by a bully nicknamed Gabara, his only friends are toy consultant Shinpei and fellow classmate Sachiko. Ichiro turns to escapist dreams of Monster Island where he befriends the equally bullied Minilla.

A short compilation film made to be shown at Takarazuka Family Land which takes footage from several Showa era Godzilla films.