Based on the plot of an award-winning Crayon Shin-chan animated movie from 2002, a boy named Shinichi (Takei) does the time-traveling and meets a feared general named Ijiri Matabei (Kusanagi). Ijiri is in love with Princess Ren (Aragaki) who subsequently rejects an arranged marriage to Okura Itakatora (Osawa), a powerful daimyo of northern Kanto. Enraged by the rejection, Okura sends a large army to Ijiri's smaller state and it's up to Shinichi to change their destiny.

11-year-old Yusuke and his classmates camp in the woods and see a strange light. They discover a small metallic object like a robot which talks, calls himself Tetra and knows Yusuke's name. Tetra can create wonderful gadgets but actually has to save the world with Yusuke's help from extraterrestrials with bad intentions.

In a time when the main source of energy was still coal, there was a man who saw the future in oil. Young Tetsuzo Kunioka who hails from Moji, Kitakyushu, rides out into the oil business, but is faced with numerous challenges and competitors who stand in his way, including domestic suppliers and major western oil companies, or the "oil majors". But Tetsuzo never gave up, however despairing the situation was. He always found a way and paved a new road with his unconventional ideas, eccentric actions, and most of all, his caring heart toward his own men. That style of Tetsuzo's was not something that would ever change, even when the tides were against him in a war-lost Japan.

Offshore, shrouded in fog, there is a mysterious island that is said to be the home of a family of monsters. It is strictly forbidden to approach it. But one day a human child, Mushroom, it loses and coming face to face with the mysterious creatures that live there. The arrival of Mushroom, makes panic on the island because the monsters are actually terrified of living humans.

In 1949, two years after the tumultuous events of Godzilla Minus One, the Shikishima family face an all-new calamity.

Humanity is under attack by human-mimicking flesh-eating alien parasites. One parasite bonds with his young high school student host, and he convinces the parasite to help him stop the others.

Teenage Mutsuko comes to Tokyo for work but ends up at a repair shop. She befriends the owner's family. Neighbors Hiromi, writer Chagawa with admirer Junnosuke strive alongside them in postwar Tokyo's evolution.