Red Line

Lore & Background

The Red Line is a continental mountain range that runs along what would be the Prime Meridian on Earth. It divides the Blue Sea into two vast oceans. Within the oceans is a second global phenomenon known as the Grand Line, which runs perpendicular to the Red Line, along what would be the equator on Earth. These geographical barriers divide the world into four seas: North Blue, East Blue, West Blue, and South Blue. Passage between the four seas, and the Grand Line, is therefore difficult. Unique and mystical features enable transport between the seas, such as the use of Sea Prism Stone employed by government ships to mask their presence as they traverse the Calm Belt, or the Reverse Mountain where water from the four seas flows uphill before merging into a rapidly flowing and dangerous canal that enters the Grand Line. The Grand Line itself is split into two separate halves, with the Red Line being between Paradise and the New World.

In Their Own Story

The Red Line is the massive continental mountain range that runs along what would be the Prime Meridian on Earth, dividing the Blue Sea into two vast oceans. It is one of the two global phenomena that define the geography of the One Piece world, the other being the Grand Line which runs perpendicular along what would be the equator. These barriers split the world into four seas: North Blue, East Blue, West Blue, and South Blue. The Red Line also separates the Grand Line into two halves: Paradise and the New World. Passage between the seas is difficult, but unique features like Reverse Mountain—where water from the four seas flows uphill into a dangerous canal entering the Grand Line—and the Calm Belt, infested with huge ship-eating Sea Kings, provide limited routes. Government ships use Sea Prism Stone to mask their presence as they traverse the Calm Belt.

Reader's Guide

The Red Line is a continental mountain range that runs along what would be the Prime Meridian on Earth. It divides the Blue Sea into two vast oceans. Within the oceans is a second global phenomenon known as the Grand Line, which runs perpendicular to the Red Line, along what would be the equator on Earth. These geographical barriers divide the world into four seas: North Blue, East Blue, West Blue, and South Blue. Passage between the four seas, and the Grand Line, is therefore difficult. Unique and mystical features enable transport between the seas, such as the use of Sea Prism Stone employed by government ships to mask their presence as they traverse the Calm Belt, or the Reverse Mountain where water from the four seas flows uphill before merging into a rapidly flowing and dangerous canal that enters the Grand Line. The Grand Line itself is split into two separate halves, with the Red Line being between Paradise and the New World.

Did You Know?

• The Red Line runs along what would be the Prime Meridian on Earth, while the Grand Line runs along what would be the equator.
• The Red Line divides the Grand Line into two separate halves: Paradise and the New World.
• Reverse Mountain is a unique feature where water from the four seas flows uphill before merging into a rapidly flowing and dangerous canal that enters the Grand Line.
• Government ships use Sea Prism Stone to mask their presence as they traverse the Calm Belt, which is infested with huge ship-eating monsters called Sea Kings.
• The Red Line is one of two global phenomena that define the geography of the Blue Planet, the other being the Grand Line.