Animeoffers a wide variety of stories across different genres, tones, and lengths, with some series wrapping up in a single season and others stretching on for decades after their initial release. While mainstream media often focuses on popular shōnen anime,there is a much larger range of shows that have aired for years,accumulating thousands of episodes along the way.
It’s important to note that anime runtimes can widely vary from series to series. Several short-format series, particularly those aimed at younger audiences, have high episode counts due to their five-to-ten-minute format. However, for consistency and fair comparison, only series with standard-length episodes, typically ranging from 20 to 26 minutes in length, will be considered. This distinction filters out padding and emphasizes shows that have delivered full-length stories over the course of impressive runs.
10Shima Shima Tora no Shimajirō
Produced by Studio Kikan, Based on the Kodomo Challenge Franchise by Benesse Corporation
Shima Shima Tora no Shimajirōfollows the everyday adventures of Shimajirō, a curious young tiger cub going to kindergarten along with his friends and learning valuable lessons as he grows. The show is aimed at preschoolers and encompasses lessons on manners, empathy, and social skills mixed with educational content. It’s a colorful series filled with charming characters, and its simple narrative makes itboth entertaining and enriching for young audiences.
The seriesbegan airing in December 1993 and concluded in March 2008, with a total episode count of 726.It’s one of the longest-runningchildren’s anime, primarily focusing on slice-of-life and educational themes. Its popularity among children led to the creation of multiple sequel series and spin-offs.
One Piece
One Piececenters around Monkey D. Luffy, a rubber-bodied pirate who strives to become the Pirate King. Luffy and his crew, the Straw Hat Pirates, set out on an adventure to find the legendary One Piece treasure left behind by Gol D. Roger. Along their journey, they encounter tyrants, forge powerful bonds, and overcome seemingly insurmountable odds. With a blend of humor, action, and emotional depth,One Piecehas quickly become one of the most well-known and longest-running anime series.
Since its debut in October 1999,One Piecehas aired over 1,125 episodes and is still ongoing. As a shōnen action-adventure, it primarily targets teens and young adults, though its length and intricate storytelling appeal to a broader audience. Despite its longevity,the series has maintained its momentum and emotional stakes, keeping fans deeply engaged.
Case Closed,also known asDetective Conan, follows a high school detective named Shinichi Kudo, who is turned back into a child after being poisoned by the Black Organization. Taking on the alias of Conan Edogawa,he secretly solves cases while searching for the shadowy organization responsible for his condition.The series is primarily driven by episodic mysteries with overarching plotlines and features red herrings, clever deductions, and a wide cast of returning characters.
In the English dub, Shinichi Kudo is instead known as Jimmy Kudo.
Since its premiere in January 1996,Case Closedhas aired over 1,150 episodes and continues to enjoy widespread popularity.Primarily aimed at the shōnen demographic, the series leans heavily into mystery, crime-solving, and suspense, with occasional touches of romance and comedy to keep things fresh. Despite its long run, it remains focused mainly on problem-solving and logic.
Crayon Shin-chanrevolves around the mischievous antics of Shinnosuke “Shin” Nohara,a five-year-old boy known for his inappropriate remarks, bizarre behavior, and complete lack of shame.Set in suburban Japan, the series explores everyday life through Shin’s eyes, whether he’s pestering his parents, confusing his teachers, or unintentionally upending societal norms. Beneath the slapstick humor and crude jokes, the show often satirizes adult life, family dynamics, and social expectations with surprising wit.
Since it first aired in April 1992,Crayon Shin-chanhas surpassed 1,250 episodes and remains in active production.The series is categorized as aseinen animedespite its child protagonist due to its mature humor and satirical edge.Crayon Shin-chanfits within the comedy and slice-of-life genres and has maintained popularity through a mix of relatability and its refusal to tone down Shin’s outrageously absurd personality.
Pokemon
Pokémonfollows the journey of aspiring trainers as they travel through various regions to capture creatures known as Pokémon, form lifelong bonds, and battle to become champions. The seriesgained popularity through the story of Ash Ketchum and his trusty Pikachu,but it hasevolved over the yearsto introduce new protagonists, regions, and an ever-expanding roster of Pokémon. With themes of friendship, perseverance, and adventure, the show remains a significant part of pop culture around the world.
Originally debuting on July 02, 2025,Pokémonhas since aired well over 1,300 episodes and is still in active production. Although it was initially intended for a younger audience, its appeal consistently bridges generations, thanks to its mix of action, fantasy, and lighthearted storytelling. Over the years, the series has undergone stylistic and narrative changes; however,its core charm and accessible worldbuilding have kept it anchored as one of anime’s most popular series.
The 2005Doraemonseries follows the lovablerobotic cat Doraemon, who is sent from the future to help a young boy named Nobita Nobi.With an endless array of futuristic gadgets, Doraemon helps Nobita navigate everyday adventures and overcome his struggles. The show is filled with heartwarming scenes of friendship, imaginative inventions, and valuable life lessons, making it a classic hit for children and families.
Since its launch,Doraemonhas aired over 1,400 episodes and continues to be in production. Primarily aimed at young children, it comfortably fits into the slice-of-life and sci-fi genres,made with an appealing, optimistic outlook and a playful spirit.Despite its long run, the series continues to attract new viewers while maintaining the charm and value that have definedDoraemonfor decades.
4Chibi Maruko-chan
Produced by Nippon Animation, Based on the Manga by Momoko Sakura
Chibi Maruko-chanprovides a nostalgic glimpse into the daily life of Maruko, a spirited elementary school girl living in suburban Japan. The series capturesthe small joys, challenges, and humorous moments of childhood through her eyes.With a blend of comedy, warmth, and family and school experiences, theanime features heartfelt storytelling, making it a charming watch for any viewer.
Since its debut in January 1995,Chibi Maruko-chanhas surpassed 1,450 episodes and continues to air.Aimed primarily at a general audience, it falls under the slice-of-life and comedy genres. The show’s appeal lies in its ability to evoke nostalgia while remaining fresh and providing a reflection on the challenges of growing up.
3Manga Nippon Mukashibanashi
Produced by Ai Kikaku Center
Manga Nippon Mukashibanashiis acollection of animated adaptations of traditional Japanese folk tales and legends.Each episode brings to life classic stories passed down through generations, featuring a wide variety of characters, from heroic samurai to mystical creatures. The anime’s storytelling style is simple, yet it effectively preserves cultural heritage while making classic stories accessible to a broad audience.
Airing from January 1975 to January 1995, the series amassed over 1,450 episodes before concluding. It primarilyaimed at a family audience and blended educational content with entertainment.With its focus on folklore and moral lessons, the series fits within historical and educational genres.
2Soreike! Anpanman
Produced by TMS Entertainment, Based on the Children’s Superhero Picture Book by Takashi Yanase
Soreike! Anpanmancenters on the heroic Anpanman, a superhero with a head made of sweet red bean bread. He protects the innocent and fights against the villainous germ-like Baikinman. The anime is designed for young children,utilizing simple storytelling, vibrant characters, and straightforward moral lessons to promote kindness, bravery, and generosity.
The seriesdebuted in October 1988 and has aired over 1,625 episodes and counting.The show combines adventure, fantasy, and educational themes for its audience. Its longevity and popularity are due to its ability to teach valuable lessons while maintaining an engaging, lighthearted atmosphere.
Sazae-sanfollows the everyday life of Sazae Fuguta and her multi-generational family, filled with ordinary moments that evoke warmth, humor, and a strong sense of community. Its gentle storytelling andfocus on traditional Japanese family values have made it a beloved classic for many. The show’s simple animation style and relatable scenarios add to its charm.
Premiering in October 1969,Sazae-sanis widely recognized as the longest-running anime with over 2,750 officially aired episodes.Some sources estimate numbers as high as 7,000 due to its extended run and inclusion of reruns. Aimed at a broad, family-oriented audience, the series is a timeless slice-of-life comedy and is still ongoing.
