Adventure, Action, Fantasy Why it’s popular: It is the best-selling manga in history. Created by Eiichiro Oda, One Piece follows Monkey D. Luffy and his pirate crew in search of the ultimate treasure. While the anime's pacing can be slow (over 1000 episodes), the manga is a masterclass in world-building, foreshadowing, and emotional storytelling. Recommendation: Read the manga first; watch specific anime fight scenes on YouTube.