The longest-running anime series is Sazae-San. It was produced in 1969 with over 2500 episodes to its name, it is known for its sheer length alone. The series revolves around Sazae-San, a loving protagonist who lives with their family, including his parents, brother and sister. The different episodes are designed so that they can be watched within succession or independently, and feature a number of peaceful scenarios set in their daily life.
Shortest anime series
FLCL (6 Episodes)
FLCL is one of the best-regarded OVA offerings from studio Gainax. Noata is an ordinary boy living in an ordinary town, that is until a woman from space strikes him in the face with a guitar which in turn leads him to sprout in fighting robot from his forehead.
Gunbuster & Diebuster (6 Episodes)
Gunbuster is known as being an early work from the venerable Studio Gainax1, the producer of a range of classics such as Neon Genesis Evangelion and Tengen Toppa Gurren Lagann.
Longest-running shonen anime
Jojo’s Bizarre Adventure (1983- Ongoing).
Is one piece the longest anime?
One piece is one of the longest-running unbroken anime series with 710 episodes.