The movie is set in the near future, when the “ARK Project” has initiated a program to increase the quality of human life through the peaceful use of robots. Dr. Komyoji, the chief scientist on the project, has developed a process to create a robot with a figurative human “heart” through the installation of a “conscience circuit”, but his plans are violently opposed by researcher Gilbert Kanzaki. When Dr. Komyoji is killed in an apparent accident, his children Masaru and Mitsuko are targeted by mysterious forces within the ARK Project looking to gain control of the scientist’s research data. But the villains are opposed by Jiro, the android with a human conscience who fights for justice as the hero Kikaider.

The son of a sailor, 5-year old Sosuke lives a quiet life on an oceanside cliff with his mother Lisa. One fateful day, he finds a beautiful goldfish trapped in a bottle on the beach and upon rescuing her, names her Ponyo. But she is no ordinary goldfish. The daughter of a masterful wizard and a sea goddess, Ponyo uses her father’s magic to transform herself into a young girl and quickly falls in love with Sosuke, but the use of such powerful sorcery causes a dangerous imbalance in the world. As the moon steadily draws nearer to the earth and Ponyo’s father sends the ocean’s mighty waves to find his daughter, the two children embark on an adventure of a lifetime to save the world and fulfill Ponyo’s dreams of becoming human.