Crayon Shin-chan follows the wacky antics and adventures of five-year-old Shinnosuke "Shin" Nohara and his parents, neighbors, and friends and is set in Kasukabe, Saitama Prefecture, Japan. Many of the jokes in the series stem from Shin-chan's occasionally weird, unnatural and inappropriate use of language, as well as from his inappropriate behavior. A typical gag involves Shin-chan confounding his parents by using the wrong phrase for the occasion; for example, saying "Welcome back!" instead of "I am back!" when he comes home. During the beginning of the series, the TV show was mostly based on the storyline in the original manga. As the show progressed, more and more episodes became anime-original.

A band of criminals want to get the treasure of the famous Treasure Island, but the key of the treasure chamber is guarded by a little kid. Then, they come to Japan and kidnap Shinosuke Nohara by mistake, who looks exactly like the little kid who has the key.

There is no such thing as an uneventful day in the life of kindergartener Shinnosuke "Shin-chan" Nohara. The five-year-old is a cut above the most troublesome, perverted, and shameless kid one can imagine. Shin-chan is almost always engaged in questionable activities such as forgetting about a friend during hide and seek, sumo wrestling for love, performing various gags including the notorious "elephant" in public, and flirting with college girls. The exemplary troublemaker has done it all and has no plans to stop anytime soon. Crayon Shin-chan follows the daily shenanigans of Shin-chan with his group of friends, parading around as the self-proclaimed "Kasukabe Defense Force." The adults witnessing these shenanigans unfold can't help but adore Shin-chan, as he keeps them entertained while unintentionally solving their daily troubles through his mindless antics—leaving himself as the only problem they do not know what to do with.

Unlike the main television anime series which is mostly set in modern-day Japan, the new series will be a "sealed room" suspense comedy set 100 years in the future. The story begins when Shinnosuke and the entire Nohara family wake up from cold sleep to find themselves aboard a space ship drifting in space. The anime will depict the various events that take place inside the ship.

Unlike the main television anime series which is mostly set in modern-day Japan, the new series will be a "sealed room" suspense comedy set 100 years in the future. The story begins when Shinnosuke and the entire Nohara family wake up from cold sleep to find themselves aboard a space ship drifting in space. The anime will depict the various events that take place inside the ship.

Master butt-swordsman Hiroshinosuke Nohara (Lone Wolf) travels with his family seeking employment. The family encounters a mysterious girl Hazumi and a wild dog Shiro, and decides to travel together. The group is attacked by various assassins, eventually their lives are threatened by the butt-swordsmen's enemy, the armpit-swordsmen of the Demon Bull Clan. Who will win: butts or armpits? Against an array of idiosyncratic enemies, Hiroshinosuke Nohara and his son Shinnosuke have the chance to display their swashbuckling skills.

Master butt-swordsman Hiroshinosuke Nohara (Lone Wolf) travels with his family seeking employment. The family encounters a mysterious girl Hazumi and a wild dog Shiro, and decides to travel together. The group is attacked by various assassins, eventually their lives are threatened by the butt-swordsmen's enemy, the armpit-swordsmen of the Demon Bull Clan. Who will win: butts or armpits? Against an array of idiosyncratic enemies, Hiroshinosuke Nohara and his son Shinnosuke have the chance to display their swashbuckling skills.

A small country town. Recently, the town has witnessed many strange incidents. A youkai kindergartner O-o-o no Shinnosuke (an apparent homage to the classic supernatural franchise Gegege no Kitarou) and his youkai father Tamatama Dad arrive in town. They are said to be looking for the yokai Big Butt Mom who has run away from home. When an elementary school girl Fumie Sakura is suddenly attacked by the mysterious Fuzzy Wuzzy, a superfluous-hair youkai, Shinnosuke goes to her aid. Their encounter is the start of the greatest youkai case in the small town's history.

A small country town. Recently, the town has witnessed many strange incidents. A youkai kindergartner O-o-o no Shinnosuke (an apparent homage to the classic supernatural franchise Gegege no Kitarou) and his youkai father Tamatama Dad arrive in town. They are said to be looking for the yokai Big Butt Mom who has run away from home. When an elementary school girl Fumie Sakura is suddenly attacked by the mysterious Fuzzy Wuzzy, a superfluous-hair youkai, Shinnosuke goes to her aid. Their encounter is the start of the greatest youkai case in the small town's history.

The anime's plot is taken from the 41st volume of the original manga's "Figure Wars" story. The story begins when toys of Oban, a character from a tokusatsu (special effects) television show, becomes popular, but also loses popualrity quickly. Many unsold Oban toys are thrown away. A bolt of lightning strikes one of these toys one day, and gives it life. Alongside other toys thrown away by people, Oban swears revenge on humans, and attacks. At the same time, Oban's sworn enemy Chūkōnen Kamen is also given life. Chūkōnen Kamen, normally a middle-aged, overweight, and depressed man, powers up by eating cup noodles. Alongside Shinnosuke, he will fight to reclaim peace for the world.

The anime's plot is taken from the 41st volume of the original manga's "Figure Wars" story. The story begins when toys of Oban, a character from a tokusatsu (special effects) television show, becomes popular, but also loses popualrity quickly. Many unsold Oban toys are thrown away. A bolt of lightning strikes one of these toys one day, and gives it life. Alongside other toys thrown away by people, Oban swears revenge on humans, and attacks. At the same time, Oban's sworn enemy Chūkōnen Kamen is also given life. Chūkōnen Kamen, normally a middle-aged, overweight, and depressed man, powers up by eating cup noodles. Alongside Shinnosuke, he will fight to reclaim peace for the world.

By finding a rare Action Kamen card, Shinnosuke Nohara and his family end up being chosen to go to a parallel world and help foil an alien invasion that is occurring over there.