It's been a long-running joke that the meaning behind the mythical One Piece treasure will never be revealed. Is it the friends Monkey D. Luffy made along the way? Are there piles of gold awaiting the Straw Hats somewhere on the Grand Line?
Whatever the case may be, One Piece creator Eiichiro Oda has finally written down the answer on a piece of paper – after almost 30 years and over 1100 manga chapters.
