Eiichiro Oda has spent nearly 30 years drawing One Piece with a level of focus that is hard to separate from the results. He slept three hours a night for 15 years, hand-copied full Disney movies to study emotion in the lines, and told new editors they had to be willing to die for the series. He started the manga at 22. He is still drawing it at 51 and still does not consider himself successful. The same standard that produced the best-selling manga series in history also meant family events lost to deadlines and almost no one else allowed to touch the pages. That trade-off is the part that rarely gets discussed when people only talk about the sales numbers. The output is extraordinary. The cost is permanent.