One Piece is among the handful of anime that have a time-skip. In One Piece, the time-skip occurred after the Summit War was over. Luffy was badly wounded both mentally and physically, and when he regained his senses, he realized that he had to delay the gathering of his crew. So, he went to Marineford again with Rayleigh and Jimbei, and he had a tattoo on his arm, that read "3D2Y."