Adult people all over Japan had been captivated by 20th Century Expo, theme parks that reenacted good old days of the 1970s (the last days of Japan's high economic growth). One day the adults disappeared into the theme parks, leaving their children abandoned. That was a plot by "Yesterday Once More," an organization who despises the 21st century and tries to bring Japan back to the 20th century with the dreams and hopes. Shinnosuke and his parents, Hiroshi and Misae, fight against the plot of "Yesterday Once More" in order to live together with family in the 21st century.

(Source: Manabu Tsuribe)

Comical action adventure film set in the future world, like a dystopian science fiction. Shinnosuke's future fiancee, Tamiko Kaneari comes from the future via the time machine. She says her father Masuzo Kaneari captures adult Shinnosuke in the future world and they needs the power of Shinnosuke at age 5 to rescue him. She takes Shinnosuke and Kasukabe Defense Forces members to the future big city Neotokio, which is the world ruled by Masuzo Kaneari, the president of the electric power company Kaneari Electric. 

(Source: Manabu Tsuribe)

Comical action spy film including an indecent material (flatus) and a story of a girl who had obeyed her parents, but becomes self-aware. A mystery spy girl Lemon Sunomono suddenly appears in front of Shinnosuke, and she calls herself an emissary of Action Kamen. She had trained as a spy by her parents in the Sukashipestan Republic, and works for the Queens. Under her guidance, Shinnosuke decides to be a spy to fight for justice, and receives spy training. Under the instruction of Action Kamen, Lemon and Shinnosuke perform a mission to creep into the laboratory in the Hedelna Kingdom and recapture a capsule from an evil professor, but Lemon finds the real purpose of the Queens, and they fight to foil the plot of the Queens. 

(Source: Manabu Tsuribe)

An action comedy set in the solar system, about a row over Himawari, Shinnosuke's younger sister, between the Nohara family and aliens. Shinnosuke has a fight with Himawari, because she ate his crème caramel. Suddenly, two mysterious men appear and Shinnosuke signs an agreement to leave her with them. They abduct the Nohara family to the Planet Himawari by UFO. On the Planet Himawari, Sunday Goronesky the Great says Himawari needs to be the princess of the planet in order to save the Earth and the Planet Himawari from the fateful crisis.

(Source: Manabu Tsuribe)