The regular series follows the adventures of the five-year-old Shinnosuke "Shin" Nohara and his parents, baby sister, dog, neighbours, and friends and is set in Kasukabe, Saitama Prefecture.
Shin-chan is all set to challenge Kung Fu in the Chinatown of Kasukabe city, known as Aiyā Town. He and the Kasukabe Defence Force are going to put up a totally no-stunt Kung Fu challenge on the stage.
It all begins when a secret agent hiding in the ship where dinner Futaba school students. The Pig Hoof follow and take the boat with her, Shin Chan and his friends on board. From there, Shin Chan, Masao, Nene, Kazama and Boo Chan van with Agent everywhere as their hostages.
Hiroshi and Misae have never been to a honeymoon trip to a foreign country. One day, Misae discovered an inexpensive and family-friendly holiday package to Australia and the Nohara family decided to make it their first honeymoon vacation. Hiroshi gets kidnapped upon arrival to Australia, leaving Shinnosuke, Misae and others on a dangerous journey. It turns out that Hiroshi is the key to a secret treasure. The remaining members of the Nohara Family must rescue Hiroshi, while a mysterious masked man and treasure hunters from all over the world are after him. The struggle is among three different groups in this action-filled treasure hunting adventure.
One night, the Nohara family were enjoying a pleasant dream, when suddenly a big fish appeared in their dreams and ate them. The next morning, Hiroshi read in the newspaper that everybody in another town had the same nightmare as him, but it seemed to have ended. But Hiroshi also heard the same dream from Misae, Shinnosuke, Himawari and even Shiro. They were surprised and thought if the same thing is happening in Kasukabe too. In kindergarten, on telling others about his nightmare, Shinnosuke was surprised to know that everybody too had the same dream. Then a mysterious girl named Saki was transferred to Futaba Kindergarten and joined Shinnosuke's class. Everyone in the class, including the rather inactive Bo-chan, were all excited and happy on seeing her. But Saki had a cold attitude and didn't get along well.
The kingdom that floats above in the sky, that uses free doodles as an energy source, “Rakuga Kingdom.” However, now in the face of a lack in energy, they are on the brink of ruin. In order to force the creation of doodles, the kingdom’s army begins its attack on Kasukabe on the surface! Meanwhile, as the drawings begin to move, the hero who is bestowed the hidden treasure of the kingdom, the “Miracle Crayon”—is none other than the “super happy-go-lucky 5-year-old,” Nohara Shinnosuke!! Together as the “Almost Four Heroes,” Shinnosuke and the drawn doodles try to take back Kasukabe! Amongst that, they discover the weakness of the doodles, where they dissolve upon contact with water! To make matters worse, a raincloud that looks to start pouring at any moment hovers above… What awaits their encounter with the doodles and the end of their adventure—will it be smiles, or tears!?
One day, a woman named Chiyome Hesogakure with a child named Chinzō visits the Nohara family and claims that she is the real mother of Shinnosuke and takes him away to a Ninja Village. In the Ninja Village, the Hesogakure family has been protecting "the earth's navel" by blocking it with a pure gold stopper using the "Mononoke technique" that has been passed down from generation. If it comes off, the earth will wither, the rotation will stop, and the "tomorrow" of the world will be lost! It is up to Shinnosuke to reveal the mystery of his birth and protect the future of the earth and the "tomorrow" of his family.
40-years ago, there was a prophecy claiming that in the year of “20” and “23”, two emitting lights would come to the Earth from outer space. And the dark light with strong power will bring out a huge disaster. In the summer of 2023, as predicted, two mysterious lights approach Japan and descend on Kasukabe. The white light hits Shin-chan, which makes him get a superpower. Meanwhile, a man called Mitsuru Hiriya, has been bathed in dark light and has acquired psychic powers begins to run amok. A man who wants the destruction of the world, Hiriya VS A happy-go-lucky kindergarten child, Shinnosuke. A superpower battle is going to begin!
Follow the friendship between the Nobara family's pet dog Shiro and a "small dinosaur". Their connection helps the growth of Shinnosuke and the Kusakabe Defense Squad.