These three series dominated the mid-2000s and remain the gold standard for long-form shonen (action-adventure) storytelling.

If you are looking for long-running anime and manga, there are a few heavy hitters that have defined the medium for decades. From the legendary " Big Three " of the 2000s to modern-day phenomena, these series offer hundreds of episodes and chapters for a truly deep dive. The Legendary "Big Three"

: The undisputed king of longevity and world-building. Following Monkey D. Luffy’s quest to become Pirate King, it has over 1,150 episodes and 100+ manga volumes. It is currently the best-selling manga of all time .

: A essential rite of passage for many fans, this 720-episode saga (including Shippuden ) follows an outcast ninja's journey to gain recognition and lead his village.

: A darker, more mature psychological thriller about a neurosurgeon who saves a boy's life, only to realize years later he saved a sociopathic monster. Record-Breaking Longevity

: Known for its incredible style and sword-based supernatural combat, it follows Ichigo Kurosaki, a teenager who becomes a Soul Reaper to protect the living from restless spirits. Modern & Classic Masterpieces

Beyond the "Big Three," these series are frequently cited by experts and fans as must-reads or must-watches due to their high quality and significant length.

: Often ranked as the highest-rated anime ever on sites like IMDb and MyAnimeList , it follows two brothers using alchemy to repair their broken bodies after a failed attempt to revive their mother.