this One Piece RPG will let you live any like you want. you can start in any island in one of the four blue seas, in the grand line, in the calm Belt, or in the red line. Keep in mind that the One Piece world is massive, approximately over 20 million, according to Marco. But it could also simply be around 800. So, you can choose a known island to start or a completely different island to start and begin your story.