What Are the Ancient Weapons in One Piece?

Discover the three ancient weapons in One Piece and learn about their locations, power, and connection to Joy Boy.

The Ancient Weapons in One Piece
The Ancient Weapons in One Piece (Source: Toei Animation)

Have you ever wondered about the ancient weapons that keep popping up in One Piece? These legendary weapons are a source of many theories among fans. They act as the most powerful forces in the entire One Piece.

There are three incredibly powerful artifacts known as ancient weapons dating back to the time of the Great War. They are named after Greek gods: Pluton, Poseidon, and Uranus. They have the power to destroy entire kingdoms, making them highly sought after by various factions in One Piece.

This guide will walk you through the Three Ancient Weapons.

What Are the Three Ancient Weapons in One Piece

The Ancient Weapon Poseidon
The Ancient Weapon Poseidon (Source: Toei Animation)

Pluton

This ancient weapon can be labeled as the world’s most “Advanced Warship” or “The World’s Worst Battleship,” depending on who might be controlling it. This massive vessel is still to be seen in action but it can wipe out the entire island with just one blast. Pluton’s blueprints were kept in Water 7 for generations, but they were eventually destroyed by none other than Straw Hat’s Franky to keep them from falling into the wrong hands.

It is also interesting to know that the blueprints were so complex that most shipwrights could not even understand them. 

Poseidon

Unlike its mechanical counterparts, Poseidon is a title given to a special mermaid princess born in the Ryugu Kingdom. This ancient weapon can communicate with and control the huge Sea Kings—gigantic sea monsters that roam the seas of One Piece.

Princess Shirahoshi is the current Poseidon, who at first had trouble controlling the power and would accidentally summon the Sea Kings whenever she got emotional.

Uranus

Here’s where things get shadowy. Uranus is the least understood of all the ancient weapons. We do not know exactly what it is. However, it could be a sky-based weapon with powerful energy beams or the World Government’s deadliest weapon.

Recently, One Piece has hinted that it could be responsible for major destruction and disappearance of entire islands.

Location of the Three Ancient Weapons in One Piece

Princess Shirahoshi
Poseidon’s form, Princess Shirahoshi (Source: Toei Animation)

We have learned about the three ancient weapons. Let’s discover their current locations.

As such, Pluton lies buried deep beneath Mount Fuji in Wano Country, safely hidden and protected by Wano’s closed borders for over 800 years. The only way to get to it is if the walls around Wano come down first.

Poseidon is currently at Fish-Man Island. This one is not exactly hidden from the world. It is in the form of Princess Shirahoshi, who was kept in isolation for years to protect her powers.

Uranus’s location is still not confirmed in One Piece. As mentioned above, it might be in the hands of the World Government. Thus, making it the most mysterious of all three weapons in the current storyline.

Joy Boy and the Three Ancient Weapons in One Piece

Joy Boy
Joy Boy (Source: Toei Animation)

The connection between the ancient weapons and Joy Boy in One Piece runs deeper than most fans might realize. According to revelations in One Piece, Joy Boy had a vision for these weapons that was not about destruction, but all about better hope.

He deliberately chose to preserve these weapons for future generations, despite knowing how dangerous they are. But the question is why would someone like him want to pass down such dangerous weapons?

The answer to that lies in Joy Boy’s goal – liberation and change for the World of One Piece.

For example, Joy Boy made a promise to the original Poseidon during the Void Century, to use the legendary ship Noah to help fulfill a greater purpose. Although Joy Boy could not fulfill the promise in his time, he ensured the power would continue through generations of the Fish-Man Island’s royal family.

There’s an interesting connection through Wano Country. Pluton has been under protection for over 800 years, suggesting a deep trust between Joy Boy and the people of Wano. They kept their entire nation’s borders closed for centuries just to protect it.

Joyboy’s goal was not to sink the world (as feared by Dr. Vegapunk) but rather to challenge those who had already caused the world to sink, namely the World Government.

Prominent Fan Theories on the Three Ancient Weapons

Kozuki Momonosuke talking to Zunesha
Kozuki Momonosuke talking to Zunesha (Source: Toei Animation)

The nature of the three ancient weapons is still vague in One Piece. As such it gave rise to countless theories among fans. Some are more convincing than others.

The “Living Weapons” theory implies that each ancient weapon might be a living being instead of an inanimate object, similar to Poseidon. This theory stems from Momonoske’s ability to communicate with Zunesha, which suggests his connection to Pluton. His Voice of All Things surpasses even legendary characters like Gol D. Roger, Monkey D. Luffy, and Oden.

Another theory focuses on Uranus’s true identity. While it’s technically in the World Government’s possession, fans believe it might have a direct connection to the mysterious Imu-sama. This theory gains strength from the weapon’s connection to the sky (Uranus being the Greek god of the sky) and Imu-sama’s position at the literal top of the world on the Red Line.

The “World Restoration” theory is another fascinating theory among fans. It suggests the three ancient weapons were not created for destruction, but rather to reverse the flooding of the ancient world. Fans anticipate Pluton might be capable of destroying the Red Line, while Poseidon’s control over Sea Kings could help reshape the seas, and Uranus might have the power to alter the world’s geography.

Conclusion

The ancient weapons in One Piece are keys to understanding the series’ mysteries. They might serve the purpose of either destruction or restoration. These super-weapons are waiting for the right moment and the right people to use them.

The true purpose of the ancient weapons may depend on whose hands they fall into. As the final saga is approaching, we might not have to wait much longer to find out!


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