What Are The 15 Longest Anime Series Of All Time?

Ever wondered what the longest anime series of all time is? There are all types of anime series each with its own unique story. 

Some of these stories can be portrayed using only a few episodes, while some are so long that the anime needs to have hundreds or even thousands of episodes divided across multiple seasons. 

With a new episode coming out every single week, many of these anime are still ongoing.

Let’s jump right into it!

One Piece

longest anime series; One Piece

Number of Episodes: 978

One Piece is the number one anime that comes to the mind of every single anime watcher whenever they think about the longest-running anime series of all time. Nope, One Piece is not the longest anime series of all time.

However, it is still the most popular long-running anime series of all time for a number of reasons. This shounen anime series is loved by millions of fans across the globe that impatiently wait for a new episode every single week.

The plot of One Piece follows the story of an anime guy named Monkey D Luffy, who is a young pirate. This pirate is currently on a journey to find the ultimate treasure known as One Piece. Gol D. Roger revealed the existence of this ultimate treasure before his death, and currently, pirates all around the world are desperately trying to find it.

Detective Conan

Detective Conan

Number of Episodes: 1008

Detective Conan is one of the most popular long-running anime series that is loved by fans not only in Japan but the rest of the world as well. Detective Conan is a series that you fall more and more in love with as you keep on watching.

The plot of this anime follows the story of a boy named Shinichi Kudou, a high school student who is also a good detective. One day, the boy finds two suspicious-looking men and decides to secretly follow them.

Turns out, these men are actually extremely dangerous! They spot Shinichi and drug him. This mysterious drug should have killed Shinichi, but oddly enough, he survives. However, there is one small problem; Shinichi has now become a seven-year-old child again. The boy decides to keep his real identity hidden and takes on the alias of Conan Edogawa.

Sekai Monoshiri Ryokō

Number of Episodes: 1006

Now, let us talk about an extremely old series that most people might not have even heard about. This anime is colorless, but its animation quality is still pretty awesome for its time.

Sekai Monoshiri Ryokō is an anime that is aimed towards a younger Japanese audience. The educational anime takes the viewers on an extremely long trip as it shows off different real-life famous places around the world.

Each episode of the anime is only 5 minutes long, and it used to air on TV Monday through Saturday. What I really love about Sekai Monoshiri Ryokō is that this anime mixes comedy with education in order to appeal to everyone.

Crayon Shin-Chan

Number of Episodes: 1068

Crayon Shin-Chan is a seinen comedy anime that is not meant for children. However, ironically, children all around the world watch Shin-Chan because it has a PG-13 rating in America. Shin-Chan is a popular long-running anime with a simplistic art style and quirky humor. The anime has been airing since 1992, and a new episode airs every Friday in Japan.

Our protagonist in this story is a little boy named Shinnosuke Nohara. This 5-year-old is one of the most inappropriate kids ever! He has a shameless and perverted personality, and he seems to engage in all kinds of questionable activities.

We follow Shinnosuke’s daily life as an anime boy who does everything he can to make his day entertaining. From playing unfairly with his friends to flirting with college girls, Shinnosuke has done it all!

Pokémon

Pokémon

Number of Episodes: 1144

Whether you are an anime fan or not, you’ve probably already heard the name Pokémon as this whole franchise has gained worldwide popularity. Pokémon is not just a popular anime series, but it is also one of the most popular video game series and a world-renowned trading card game.

The Pokémon series has been ongoing for many years, but the plot of the anime always remains the same. Our protagonist is a boy named Ash Ketchum, who lives in a world in which wonderful beings called pokémons exist.

These pokémons can be captured using poke-balls and then trained for battle. Ash Ketchum only has a single dream – to become the Pokémon Master. In order to achieve his dream, the boy will have to become the strongest Pokémon trainer of all time.

Monoshiri Daigaku Ashita no Calendar

Number of Episodes: 1274

Monoshiri Daigaku Ashita no Calender is actually the sequel of two other anime shows that also aired back in the 1960s. This entire anime series is extremely old, so no one today would even remember the name.

While the series had colorless animation at the start, Monoshiri Daigaku Ashita no Calendar had complete colors and featured the best animation quality available at the time.

With all of its episodes only being around 5-minutes long, the anime is an educational series, just like the 13th entry on this list that focuses on various important historical events that happened throughout time.

Sadly, you can’t find this anime series anywhere today. Only a few random episodes have been uploaded on the internet that are hard to find.

Chibi Maruko-Chan

Number of Episodes: 1418

Chibi Maruko-Chan is not very well-known in the western world. However, this anime is popular in Japan and loved by little girls all around the country. Chibi Maruko-Chan is just a wholesome little slice-of-life anime that follows the daily life of a girl named Momoko Sakura, sometimes called “Chibi Maruko-Chan.”

Momoko is an elementary school student that lives a pretty straightforward life. This girl loves manga, and her favorite idol is an anime girl named Momoe Yamaguchi. She lives together with her loving parents, grandparents and an older sister. At school, Momoko loves to hang out with her best friend named Tama-Chan and loves to interact with other kids her age as well.

Hoka Hoka Kazoku

Number of Episodes: 1428

With a huge number of episodes, Hoka Hoka Kazoku is one of the longest-running anime series of all time that is not airing anymore. This is a wholesome slice-of-life anime that is appropriate for people of all ages.

Hoka Hoka Kazoku has no real plot, as this anime just follows the daily activities of a huge multi-generational family. All the family members have pretty fascinating individual lives that are super entertaining. The anime mixes the genres of education and comedy together as it shows us how this family consisting of interesting characters deals with all kinds of problems.

Manga Nippon Mukashi Banashi

Number of Episodes: 1471

Manga Nippon Mukashi Banashi is a pretty interesting long-running anime series that is still remembered as something artistic and unique. Every episode in the series has its own plot as it portrays different Japanese folk tales.

The creative staff working on this long-running anime changed for every single episode. That is why the entire anime keeps on changing and evolving with time! In this historical anime, we see all kinds of entertaining adventures revolving around many characters from different timelines. Many other series tried to copy the “rotation idea” of this anime, but none were able to surpass the success of Manga Nippon Mukashi Banashi.

Sore Ike! Anpanman

Sore Ike! Anpanman

Number of Episodes: 1525

Of course, this list can never with complete without at least one super-hero anime. Sore Ike! Anpanman is a long-running action anime that first started airing all the way back in 1988, and it is still ongoing. The anime has a very simplistic art style which has evolved a lot throughout the years.

Our protagonist in this story is the one and only Anpanman. One night, a star of life fell down the chimney of a bakery onto the dough. Afterwards, the dough suddenly came to life and became Anpanman. Anpanman is an extremely powerful superhero who helps the people in need and fights against his rival named Baikinman.

Oyako Club

Number of Episodes: 1818

Oyako Club is a humorous and wholesome slice-of-life anime that finished airing just a few years ago. Oyako Club has a pretty simplistic and cartoonish art style, and just like the previous entry on this list, its animation quality evolved a lot throughout the years.

The plot of the anime follows the story of two aliens named Rompa and Lun. Both of these creatures join a family of humans and make their daily lives extremely interesting. Each episode of the anime is only 5 minutes long and filled with excitement.

Ojarumaru

Ojarumaru

Number of Episodes: 1857

Ojarumaru is a light-hearted comedy anime for little kids that mixes the genres of fantasy and adventure to create something extremely entertaining. This anime series is still ongoing, even though it started all the way back in 1998.

Our protagonist in this story is a boy named Ojurmaru, who is extremely bored with his privileged life. When three demons steal the power-stick of the demon Enma, Ojarumaru finds it and uses it to transport himself to the present time.

In this new timeline, Ojarumaru befriends a boy named Kazuma and becomes a part of his family. We follow the adventures of Ojarumaru as he makes all kinds of new friends and avoids the demons.

Nintama Rantaro

Nintama Rantaro

Number of Episodes: 2245

Nintama Rantaro is a comedy ninja anime for kids that is loved by many in Japan. The anime has a comical art style, and its animation quality is also pretty good. With a huge cast of interesting and dynamic characters, Nintama Rantaro is an awesome anime that just keeps on delivering in every single episode.

The plot of this anime revolves around three ninja apprentices named Rintaro Inadera, Shinbei Fukutomi and Kirimaru Settsuno. As shinobi in training, the three of them must learn every single technique. However, our three heroes are just concerned with money, food and having fun.

Doraemon

Doraemon

Number of Episodes: 2899

Not only is Doraemon one of the longest-running anime series of all time, but it is also so popular that it has become a household name in many countries. The anime series has been dubbed into many languages, and it is enjoyed by children all around the world.

The plot follows the story of a boy named Nobita Nobi, who is extremely lazy and not good at studies or sports. One day, a cat-like robot named Doraemon travels back in time to help Nobita become a better person.

Doraemon has a pocket on his belly that is able to store infinite amounts of future gadgets. We see new kinds of gadgets in every episode as Doraemon tries to help Nobita.

Sazae-San

Sazae-San

Number of Episodes: 7000+

Sazae-San is currently the longest-running anime series of all time by a long shot! The series is still ongoing as new episodes are released every single week. This anime also holds the Guinness World Record for the longest animated series of all time. 

Despite being ongoing since 1969, Sazae-San is not very well-known outside of Japan. While the animation quality of this series has evolved over the years, its art style is still extremely simplistic.

The plot of this anime follows the story of Sazae-San – a mother living together with her husband, parents, and children. We follow the daily life of Sazae-San and her family as they interact with many interesting characters and face normal everyday problems.