12. Chibi Maruko-Chan (1995) with 1010+ Episodes
The second adaptation of the Chibi Maruko-Chan kids slice-of-life manga, this series has been airing for over 20 years and is still running strong. Its relatable storyline is easy to understand, making it popular with young children, as well as adults who want something simple to watch that will ease the stress of their everyday lives. As with Conan, this long-running anime may also evolve into something more amazing in the years to come, hopefully making its way into the top 10, at least, longest running anime.