| Ancient Weapons (One Piece) | |
|---|---|
| Name | Ancient Weapons |
| Franchise | One Piece |
| First appeared | "Arabasta" arc (manga chapter 188) |
| Creator | Eiichiro Oda |
| Type | Weapon |
| Notable users | Gorosei (knowledge), Pluton's schematics, Poseidon (Shirahoshi) |
Ancient Weapons (One Piece)
Ancient Weapons in One Piece are three legendary, planet-scale armaments—Pluton, Poseidon, and Uranus—said to possess the power to destroy islands or overturn global power balances. They matter because their existence ties into the Void Century, the secrets of Joy Boy and the Poneglyphs, and they drive much of the series' geopolitical conflict and themes of justice and freedom.
Ancient Weapons originate in the Void Century, a lost 100-year period erased from public history by the World Government shortly after the formation of the Great Kingdom. Their creation is attributed to an advanced civilization whose technology rivaled or surpassed present capabilities. Knowledge of the Weapons survives primarily through Poneglyphs, scattered texts produced by Kozuki Clan and other cultures to preserve the True History. Scholars such as Dr. Vegapunk and historians like Professor Clover and members of the Ohara archaeological community sought to decode these records before facing persecution by the Buster Call and the World Government.
The canonical trio consists of three distinct systems with unique mechanics and social ramifications.
- Pluton: Described as a massive warship or blueprints for an enormous battleship capable of mass destruction. The blueprints once rested in Alabasta and were sought by figures like Crocodile and the Baroque Works organization. The ship's plans were carved into a Poneglyph and later entrusted to the Kingdom of Water 7's shipwright lineage via Tom and his apprentices. - Poseidon: An ability bound to a living person—specifically a mermaid princess—who can control and communicate with ancient, giant sea creatures known as the Sea Kings. The current inheritor, per storyline, is Shirahoshi of Fish-Man Island, whose power raises ethical questions about weaponization of sentient beings and colonial exploitation. - Uranus: Largely mysterious; canonical texts and characters speculate it may be an aerial or celestial weapon or technology associated with the Sky Islands and advanced materials. Its exact form remains a major unanswered element tied to the Void Century.
Across eras, the Ancient Weapons influenced wars, state formation, and hegemonic stability. The original Great Kingdom reportedly possessed one or more Weapons, prompting rival polities and the proto-World Government to act to neutralize that threat. Possession or even knowledge of an Ancient Weapon has repeatedly justified extreme measures by authorities—Ohara's destruction and the worldwide prohibition on archaeologists are emblematic. The Weapons also shaped maritime law through institutions like the Marines and contributed to the World Government's centralization of historical narrative, affecting marginalized peoples such as the Minks, Fish-Men, and island nations.
Ancient Weapons are not mere military assets but symbols of sovereignty and instruments of systemic oppression or liberation depending on who wields them. The World Government's secrecy and targeted repression (e.g., the Buster Call, persecution of Ohara) illustrate a political calculus to prevent redistribution of existential power. Revolutionary movements, including the Revolutionary Army led by Monkey D. Dragon, view knowledge of the Weapons as leverage to challenge imperial order. Pirate actors like Blackbeard and state actors alike seek the Weapons to alter the global balance, raising questions about accountability, civilian safety, and restorative justice for communities historically victimized by weapons research and colonial expansion.
Notable moments include: - The revelation of Pluton blueprints in the Alabasta arc and the role of Tom and the Galley-La Company shipwright tradition. - Shirahoshi's emergence as Poseidon in the Fish-Man Island arc and the ethical controversy over using sentient maritime life as a weapon. - References by the Gorosei and other high-ranking World Government figures connecting the Weapons to the One Piece's broader mysteries. Notable users or claimants in the story range from historical owners like the Great Kingdom to modern seekers such as Crocodile, the CP0 intelligence agency, and pirate crews motivated by revolution or domination. Speculative or indirect controllers include governments that hoard knowledge, such as the World Government and clandestine scientists like Dr. Vegapunk.
Fan and in-universe scholarly discourse theorizes about Uranus' nature, the moral status of Poseidon's host, and the possibility of combining Weapons for planetary-scale effects. The Ancient Weapons function as narrative devices interrogating themes of historical erasure, technological ethics, and reparative justice for oppressed peoples—resonant with left-leaning critiques of state secrecy and militarized power. Culturally, they fuel pirate legend, inspire Revolutionary Army propaganda, and catalyze plotlines about reclaiming agency for subjugated islands and races. Academic-style debates within the series (archaeologists, Kozuki Oden's diary readers) mirror real-world disputes over heritage preservation versus state control.