Overview
- The world of One Piece comprises two main segments of the Grand Line: Paradise and the New World, where the current storyline unfolds.
- The Calm Belt is a unique maritime region characterized by its stillness; however, it is treacherous due to the presence of Sea Kings.
- The origins of the Calm Belt’s formation remain largely speculative, with fans proposing various theories involving Devil Fruits or natural phenomena.
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One Piece takes place on the Grand Line, which features two distinct regions: Paradise and the New World. As the Straw Hat Pirates navigate this expansive ocean route, they transition from the relative safety of Paradise to the unpredictable dangers of the New World.
Within this vast world, another significant region is the Calm Belt—an area often perceived as serene due to its lack of wind and turbulent waves. Yet, this tranquility comes with its own set of perils, making navigation through the Calm Belt complex and often perilous.
The Calm Belt and the Grand Line
Where Can You Find the Calm Belt in One Piece?



The Calm Belt surrounds the Grand Line, a crucial oceanic expanse in the One Piece universe that encircles the world horizontally. Despite the spherical nature of the planet, the Grand Line is typically represented in a way akin to latitude lines on maps.
Notably, the Red Line intersects the Grand Line, effectively dividing it into two halves. If the Grand Line is illustrated horizontally, the Red Line serves as a vertical “ring”of land encircling the globe, providing a habitat for various civilizations.
The Grand Line is divided into two major segments: the initial part known as Paradise and the ongoing narrative in the New World. Historically, only the legendary Roger Pirates managed to traverse the entire Grand Line, with its complex routes presenting significant challenges that the Straw Hat Pirates, led by Luffy, aim to overcome.
The Risks Associated with the Calm Belt in One Piece


Known colloquially as the “Calm Lines,”the Calm Belt consists of two segments situated north and south of the Grand Line. This area is devoid of wind and currents, enabling a deceptively tranquil sailing experience for ships powered by sails. Nevertheless, it remains inherently dangerous, particularly for vessels without propulsion systems.
Even for self-propelled crafts, the Calm Belt is fraught with danger, primarily due to the presence of formidable Sea Kings, oceanic giants that make these waters their home. While the calmness of the sea might attract sailors, it simultaneously serves as a habitat for these monstrous creatures, necessitating caution. Notable islands located within this region include:
- Amazon Lily
- Rusukaina
Fans speculate that the Calm Belt may draw inspiration from the concept of horse latitudes—high-pressure zones near the equator where winds are typically light. One popular theory suggests that historical Spanish vessels often disposed of horses that died from dehydration during extended journeys, giving rise to the term.
What Accounts for the Calmness of the Calm Belt?

Though it may sound humorous, the reason behind the Calm Belt’s unusual stillness remains ambiguous. If this phenomenon parallels that of horse latitudes, it could be explained through natural weather patterns, such as the Intertropical Convergence Zone. However, certain theories propose that the influence of Devil Fruits may also contribute to the prevailing tranquility, suggesting a mysterious force at play.
Fans can enjoy the adventures of One Piece by streaming the series on platforms such as Crunchyroll, Netflix, and more.