One Piece is an anime adapted from the manga by Eiichiro Oda. The story begins with the event of Gol D. Roger, the most notorious pirate who left behind the legendary treasure known as the One Piece. Since then, the quest to become the Pirate King has been a recurring theme.

The ongoing manga has continued to be published, and the anime started airing in 1999, comprising over 1,090 episodes. One Piece is one of those rare anime series that began and seems to have no end in sight, with many fans not wanting it to conclude despite its 24-year run.

9 – Ojarumaru: (1998 – Present)

Imagine a five-year-old prince traveling to modern-day Japan. Ojarumaru is a humorous animated series for children, revolving around the adventures of the prince, who is often pursued by three oni (demons) simply because of a magical scroll he “borrows.”

Since its debut in 1998, Ojarumaru has produced up to 2,037 episodes. Even after 25 years, the young prince continues to explore many fascinating aspects of modern-day Japan.

8 – Doraemon: (1979 – 2005)

Doraemon is an iconic work that has been running for 26 years in manga form, totaling over 1,700 episodes. While it may not be the longest-running anime by episodes, the combined episodes of all Doraemon series exceed 3,000. The series features many time-travel adventures and intriguing inventions.

7 – Pokémon: (1997 – Present)

As long as the gaming franchise continues, the Pokémon anime will live on. Ash Ketchum and his partner Pikachu journey across the globe, capturing new Pokémon and battling to become a Pokémon Master. This anime has achieved global success, with Pikachu being beloved in many countries.

After 25 years and 1,232 episodes, Ash’s journey has concluded, but Pokémon Horizons is currently running to continue the story. Since 1997, there have been 1,269 episodes aired, and this franchise is set to keep growing.

6 – Detective Conan: (1996 – Present)

Shinichi Kudo is a detective who transforms into a child after being poisoned by a criminal organization. The anime showcases Shinichi solving mysteries while seeking a way to regain his original form. With more than 1,100 episodes since 1996, this series combines thrilling episodic mysteries with an overarching narrative.

5 – Chibi Maruko-chan: (1995 – Present)

Chibi Maruko-chan is an anime about the daily life of Momoko “Maruko” Sakura. With over 1,400 episodes since 1995, this show is perfect for anyone seeking nostalgia and a slice of life that is both heartwarming and humorous. The series is based on one of the most popular shoujo manga, showcasing simple yet impactful stories that resonate with audiences.

4 – Nintama Rantarō: (1993 – Present)

Nintama Rantarō is not just a mere anime, but a cultural lesson about Japanese traditions, presented in a comedic manner. It follows Rantarō, a first-year student at a ninja school, along with his friends Kirimaru and Shinbee. Since 1993, the series has entertained both children and adults, featuring over 2,321 episodes, each about 10 minutes long. It combines humor with adventurous escapades.

3 – Crayon Shin-chan: (1992 – Present)

Crayon Shin-chan is an anime that audiences can either love or hate, with Shinnosuke Nohara at its center. Since 1992, with over 1,200 episodes, Shin and his friends have caused chaos and brought laughter to viewers. The English dubbed version has added its own creative flair, enhancing the humorous nature of this beloved series.

2 – Soreike! Anpanman: (1988 – Present)

Soreike! Anpanman is not just an anime, but a cultural symbol in Japan. Anpanman, the heroic bread character, battles against the villain Baikinman and other antagonists. Since 1988, with 1,572 episodes, Anpanman remains one of the most beloved characters among children in Japan and holds a special place in the cultural landscape.

1 – Sazae-san: (1969 – Present)

Sazae-san is more than just an anime; it’s a phenomenon, having been on air for over 53 years. With more than 2,640 episodes since 1969, it is the longest-running animated series in history, breaking cultural boundaries. The show revolves around the daily life of Sazae Fuguta, a housewife, and her family. Sazae-san is so significant in Japan that it has given rise to a cultural phenomenon known as “Sazae-san syndrome,” where viewers feel a sense of nostalgia each week before the new episode airs.