One Piece: The Void Century, Joy Boy & Ancient Weapons Explained
AnimeGrid Editorial
July 4, 2026 • 12-15 minutes
The Enigmatic Void Century: A Forbidden Era
The Void Century stands as the most profound historical blackout in the One Piece universe, an 800-year gap in recorded history that the World Government aggressively suppresses. This period, roughly 900 to 800 years before the current timeline, holds the answers to the greatest secrets of the world, including the true nature of the World Government's foundation and the D. initial. Any attempt to research or disseminate information about this era is deemed a capital crime, punishable by the horrific Buster Call, as tragically demonstrated by the annihilation of Ohara.
What little we know about the Void Century comes primarily from the Poneglyphs – indestructible stone blocks scattered across the world, inscribed with ancient texts. These Poneglyphs are the only tangible remnants of this forgotten age, detailing events, locations of Ancient Weapons, and the messages of those who lived during that time. The Oharan scholars, led by Professor Clover, were among the few who dedicated their lives to deciphering these forbidden texts, eventually uncovering fragments that suggested a powerful, advanced civilization existed prior to the World Government's rise, one that was ultimately overthrown. Their discovery posed such a threat that their entire island and its inhabitants were wiped out, a stark warning against seeking the truth.
Joy Boy's Legacy and the Ancient Promise
Central to the narrative of the Void Century is the mysterious figure of Joy Boy, an individual who lived 800 years ago during this forbidden era. His story is etched onto the Sea Forest Poneglyph on Fish-Man Island, revealed to Nico Robin as an apology to the ancient Mermaid Princess, Poseidon. Joy Boy made a solemn promise to the Mermaid Princess of that era, a commitment to move Fish-Man Island to the surface, bringing its inhabitants into the sunlight. This promise, however, remained unfulfilled, and he apologized for his failure, leaving behind the massive ark Noah as a vessel for this eventual migration.
The implications of Joy Boy's existence are monumental. He was clearly a person of immense influence and power, capable of forging pacts with crucial figures and undertaking projects of colossal scale, like the Noah. His unfulfilled promise casts a long shadow, suggesting that the current Mermaid Princess, Shirahoshi, is the reincarnation of the original Poseidon, and that Luffy, or someone like him, is destined to fulfill Joy Boy's ancient vow. This intertwining of past and present destinies highlights the cyclical nature of history within One Piece, where past failures await future resolutions, often tied to individuals bearing the initial D.
The Terrifying Power of the Ancient Weapons
The Ancient Weapons are three legendary armaments of unfathomable power, each capable of mass destruction and reshaping the world. Known as Pluton, Poseidon, and Uranus, these weapons were created or existed during the Void Century and played a crucial role in the conflict that culminated in its suppression. The World Government fears their re-emergence above all else, as their combined might could easily overturn the global balance of power and expose the truth they've painstakingly concealed for centuries.
These weapons are not merely relics; two of them are sentient beings or entities. Pluton is a colossal battleship, capable of annihilating islands, whose blueprints were passed down through the shipwrights of Water 7. Poseidon is a living weapon, the ability to command Sea Kings, reincarnated through specific Mermaid Princesses. Uranus, the third and most enigmatic, remains largely undefined, its form and capabilities shrouded in mystery, though theories suggest it could be a creature, an object, or even a weather-manipulating force. The pursuit and control of these weapons drive many of the major conflicts and hidden agendas throughout the One Piece narrative, promising truly cataclysmic implications if unleashed.
Imu and the Shadowy Throne of the World
While the Gorosei are publicly known as the highest authority of the World Government, the true ruler sits on the Empty Throne: Imu. This shadowy, enigmatic figure resides in the deepest reaches of Mary Geoise, unknown to the vast majority of the world, and holds absolute power over the entire global infrastructure. Imu's existence completely upends the long-held belief that the Empty Throne was a symbol of equality among the founding nations, proving that one individual truly orchestrates the world's balance and its historical suppression.
Imu's direct involvement in world affairs, from ordering the annihilation of Lulusia Kingdom to wielding an ancient weapon against it, underscores their incredible authority and ruthless determination to maintain control. It is highly probable that Imu played a pivotal role in the events of the Void Century, perhaps even being one of the original founders or a direct descendant of those who established the World Government 800 years ago. Their existence connects directly to the fear of the Ancient Weapons and the forbidden history, solidifying their position as the ultimate antagonist guarding the world's most dangerous secrets.
Frequently Asked Questions
What exactly is the World Government trying to hide from the Void Century?
The World Government is suppressing the truth about the war that occurred during the Void Century, specifically the nature of the 'Great Kingdom' that was defeated and the true history of the 'D.' initial. It's believed that this hidden history would expose the World Government's tyrannical origins and its true nature as an oppressive force, potentially leading to a global rebellion.
Who is Joy Boy, and why is his promise so important?
Joy Boy was an important figure during the Void Century who made a significant promise to the ancient Mermaid Princess, Poseidon, regarding moving Fish-Man Island to the surface. His unfulfilled promise and apology, recorded on a Poneglyph, imply a future individual (potentially Monkey D. Luffy) will inherit his will and fulfill this ancient vow, signifying a major turning point for the Fish-Man race and potentially the entire world.
Are the Ancient Weapons inherently good or evil?
The Ancient Weapons themselves are neutral instruments of immense power. Their morality depends entirely on the hands that wield them. While capable of catastrophic destruction, they were originally created or existed during the Void Century and could potentially be used to protect or reshape the world for the better, much like Pluton's blueprints were safeguarded to prevent misuse.