One Piece

Oda himself confirmed in an interview with Momoko Sakura that the One Piece isn't something like "the journey itself was the real treasure" and that it is, in fact, a physical reward."Hitotsunagi no Daihihō", translating to "The Great Treasure of One Piece") is a legendary treasure said to be of unimaginable value. It was said to be hidden somewhere deep in the Grand Line, presumably on the last island, Raftel, by the late Pirate King Gol D. Roger. Before Gol D. Roger was executed, he announced to the world that this great treasure, could be claimed by anyone worthy enough to reach it, thereby starting the "Great Age of Pirates." The Mystery of the Great Treasure No one except the surviving members of the Roger Pirates actually knows where and what the great treasure is. Given the recurring theme that a treasure is merely something of great personal value (e.g. Luffy's hat), One Piece may be nothing more than an item Gol D. Roger...