The mystery of the “D” and the meaning of One Piece


We already know that One Piece is a very popular series created by Eiichiro Oda. The story focuses on a crew of pirates looking for a treasure called One Piece. In this article, we will understand 2 mysteries, the meaning of One Piece and why many characters have “D.” in the surname.

What can one piece mean

The One Piece anime shows Captain Monkey D. Luffy and his crew looking for a treasure trove from the famous pirate Gol D. Roger named after One Piece. Everything was revealed during the execution of the pirate king Gol D Rogers.

During his execution he revealed that all his treasure was hidden in one place in a single piece (One Piece) which gave rise to the term One Piece and also the golden age of pirates in anime and manga.

The mystery of the “d” and the meaning of one piece

One Piece in real life can mean things beyond just the first piece or a piece. One Piece is also a piece of clothing worn by women in swimming, the famous sukumizu for which the Japanese have a great fetish.


One Piece is not necessarily a school bathing suit like sukumizu, but it is a swimming or beach suit made up of just one piece instead of two like a bikini. In Japanese it can be called a monokini [モノキニ].

In Japan One Piece [ワンピース] is not just about swimsuits, but almost any outfit or dress made up of just one piece, as a single piece. We don't know if the author let himself be carried away by a piece of clothing to inspire the title of his manga, but I don't doubt anything about the Japanese.

The mystery of the “d” and the meaning of one piece

Everything is supposition of a possible inspiration for the name, since the Japanese love to put secrets or have crazy inspirations. The name One Piece probably has another, deeper meaning, but has not yet been revealed in the work. It may also be linked to the subject that we will discuss below, the will of D.

The secret behind the "D" in the characters' names

Many anime characters of One Piece has a “D” in the second name that creates mystery for all fans and readers of the work. Some have already created theories that it means Dragon, Devil, Damashii, the smile or even half a circle.

It is believed that the “D” refers to a lineage, an example is the fact that Gol D. Roger father of Portgas D. Ace. The characters that have the “D.” in the name are:

  • Monkey D. Luffy
  • Gol D. Roger 
  • Portgas D. Ace 
  • Marshall D. Teach
  • Jaguar D. Saul
  • Monkey D. Garp
  • Monkey D. Dragon
  • Portgas D. Rouge 
  • Trafalgar D. Water Law
The mystery of the “d” and the meaning of one piece

Despite all the rumors, so far the facts about “D.” are:

  • It stems from the act of smiling after death;
  • It is connected with "Will";
  • The "D" are called "Natural Enemies of God";
  • A natural enemy of those who take over the world;

The D. can refer to the lost civilization that existed during the Empty century and was exterminated by the group that one day would become the World Government the greater Royalty. The biggest mystery of "D." is that most of those who carry the “D.” in their names, they do not know its true meaning. 

When Whitebeard was discussing the “Will of D.”, he mentioned One Piece in the same statement, which implies that “D.” and One Piece may have a connection instead of just being a simple treasure hidden by Gol D. Roger.

Kureha was the first to mention the “Will of D.” when he revealed that the real name of the Pirate King was Gol D. Roger and not Gold Roger. Jaguar D. Saul also said specifically that the "D" is linked to the family and is a hereditary title.

It seems that all "D" share a similar faith in their dreams and destinies. Whenever a "D." appears, a series of major events can occur, including wars, changes in government and the dawn of a new era.

The concept of those who have the "D" is "Natural Enemies of God" can go beyond the Tenryuubitos, like Enel, who declared himself as a God and was defeated by Monkey D. Luffy.