The world of One Piece is traversed by the Red Line and the Grand Line. However, the name of the blue planet was unknown to many readers until now. In a Q&A session, the mangaka of One Piece, Eiichiro Oda, revealed the name of the planet.
What is the name of the planet? Oda answered fan questions again in an issue of the SBS. Fans can ask a question about the universe of One Piece, which the creator then answers. In the 111th issue, a reader wanted to know, in addition to the name of a bridge, what the name of the planet is where Luffy and his friends experience their adventures.
Oda responds to this:
Hu-huh?! What?! That’s a trick question!! Uh, first of all, this planet is called “Blue Planet” (青色の星).
The characters for Blue Planet can also be translated as Blue Star. However, in this case, it makes more sense for the planet to be called “Blue Planet”. So this is where the stories that Luffy and his crew experience take place.
Thus, we also know that it is not Earth in another time era, but a fictional world. Because in the original Japanese, there is no term 青色の星 for Earth. A variation of it is instead used for blue giants, i.e., giant stars.
However, as One Piece insider newworldartur mentions on X, this information has been revealed before, but hidden in a cover story. In the cover page of chapter 472, Blue Planet has already been mentioned once.
Additionally, Oda mentions that the bridge the fan referred to is not Tequila Wolf, but could be Bourbon Wolf. The author does not want to directly reveal which bridge it is. It is said to be one of 4 bridges that exist on Blue Planet.
Cool ships sail the seas of Blue Planet:
This is how the world of One Piece is structured
What does Blue Planet actually look like? Blue Planet consists of 4 oceans: the North Blue, West Blue, South Blue, and East Blue. The oceans are separated by a landmass (Red Line) and vertically by a sea belt (Grand Line).
The 4 seas converge at Rivers Mountain. On the mountain, there is the possibility to switch to the Grand Line. Because one cannot sail directly to the Grand Line from the sea, as it is surrounded by a windless and dangerous Calm Belt.
On the other side of the planet, where the Grand Line and the Red Line meet, are the city of Mary Geoise (above water) and Fish-Man Island (underwater).
The Red Line is the only continent still existing on Blue Planet. Here, the world aristocrats live in the land of gods. It is also the headquarters of the World Government. In contrast, the Grand Line is home to many islands that each have their own climate. Somewhere on it is also hidden the One Piece. However, some of the islands are likely to sink in the near future.
Moreover, we know that there is extraterrestrial life in the world of One Piece. The Blue Planet has a moon on which an ancient race lived. These winged people built robots on the moon but had to leave them behind when resources ran low: One Piece: What happened to Enel? This is how the Thunder God is doing today
