One Piece (Japanese: ワンピース Hepburn: Wan Pīsu) is a Japanese manga series written and illustrated by Eiichiro Oda. It has been serialized in Shueisha’s Weekly Shōnen Jump magazine since July 22, 1997, and has been collected into 94 tankōbon volumes. The story follows the adventures of Monkey D. Luffy, a boy whose body gained the properties of rubber after unintentionally eating a Devil Fruit. With his crew of pirates, named the Straw Hat Pirates, Luffy explores the Grand Line in search of the world’s ultimate treasure known as “One Piece” in order to become the next King of the Pirates.
No one except the surviving members of the Roger Pirates actually knows where and what the great treasure is. The most popular theory is that they hid it on Laugh Tale, the final island of the Grand Line.
Given the recurring theme that a treasure is merely something of great personal value (e.g. Luffy’s hat) and that Roger, like Luffy, did not value money or gold, One Piece may be nothing more than an item Gol D. Roger valued. In Buggy’s flashback to his days as a member of the Roger Pirates, he discussed with Shanks the meaning of a treasure, and he found that all the crew shared the same views regarding personal value.
After decades of speculations and doubts, the treasure’s existence was confirmed by Whitebeard with his last breath. He mentioned that “a grand battle will engulf the entire world” and “the world will be shaken to its core” when One Piece is found.