We already know that One Piece is a very popular series created by Eiichiro Oda. The story focuses on a crew of pirates searching 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 their surname.
What One Piece might mean
The anime One Piece shows Captain Monkey D. Luffy and his crew searching for a treasure from the famous pirate Gol D. Roger, which is named One Piece. Everything was revealed during the execution of the Pirate King Gol D. Roger.
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 to the golden age of pirates in anime and manga.

One Piece in real life can mean things beyond simply the first piece or a piece. One Piece is also a piece of clothing worn by women for swimming, the famous sukumizu, which the Japanese have a great fetish for.
The One Piece is not necessarily a school swimsuit uniform like sukumizu, but it is a swimming or beach outfit made of just one piece instead of two like a bikini. In Japanese, it can be called monokini [モノキニ].
In Japan, One Piece [ワンピース] does not refer only to swimsuits, but practically any clothing or dress made of just one piece, like a one-piece garment. We do not know if the author was inspired by a piece of clothing to title his manga, but I have no doubt about the Japanese.

Everything is speculation about a possible inspiration for the name, as the Japanese love to place secrets or have crazy inspirations. The name One Piece probably has a deeper meaning, but it has not yet been revealed in the work. It may also be related to the topic we will discuss below, the will of D.
The secret behind the “D” in the characters’ names
Many characters from the anime One Piece have a “D” in their second name, which 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 of a circle.
It is believed that the “D” refers to a lineage, an example being the fact that Gol D. Roger is the father of Portgas D. Ace. The characters that have “D.” in their names 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

Despite all the rumors, so far the facts about “D.” are:
- It derives from the act of smiling after death;
- It is linked to “Will”;
- The “D” are called “Natural Enemies of God”;
- A natural enemy of those who seize the world;
The D. may refer to a lost civilization that existed during the Void Century and was exterminated by the group that would one day become the World Government, the greater Royalty. The greatest mystery of “D.” is that most of those who carry the “D.” in their names are unaware of its true meaning.
When Whitebeard was discussing the “Will of D.”, he mentioned One Piece in the same statement, implying that “D.” and One Piece may have a connection rather than being just a simple treasure hidden by Gol D. Roger.
Kureha was the first to mention the “Will of D.” when she revealed that the true name of the Pirate King was Gol D. Roger and not Gold Roger. Jaguar D. Saul also specifically said that the “D” is linked to family and is a hereditary title.
It seems that all the “D” share a similar faith in their dreams and destinies. Whenever a “D.” appears, a series of great events can occur, including wars, changes in government, and the dawn of a new era.
The concept that those who possess the “D” are “Natural Enemies of God” may go beyond the Tenryuubitos, like Enel, who declared himself as a God and was defeated by Monkey D. Luffy.



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