
JoJo’s anime is an incredibly faithful adaptation and each part is essential. If you go off of the idea that some parts are filler, you don’t even need to watch any of them before Part 7 drops since Steel Ball Run is an entirely separate continuity. Although some parts are more direct continuations of others, each build off each other and expand the world in important ways. If someone doesn’t show up immediately after their part ends, they might be in the next one (or in 1 case 5 parts later)