The Wado Ichimonji is a sword of great personal importance to Roronoa Zoro, and it once belonged to Kuina and her family. It is also one of the 21 Great Grade swords. After Kuina's death, Zoro asked for it from her father, who then gave the sword to him.
The sword has a pure-white hilt with a circular hand-guard. The sheath is painted white and the hardening line is suguha or straight blade.
In descriptive terms, Wado Ichimonji is a Shinogi Zukuri style Katana that has a traditional yet still stunning pure-white ito wrapped around a gray samegawa covering the tsuka (hilt), leaving a traditional diamond-shaped pattern. The end has a nice, simplistic kashira of the same color as the tsuba. The tsuba, or crossguard, also conveys a harmony of simplicity: It consists of a rounded oval thick tsuba from which the blade goes through, in a nice metallic golden color. To once again convey the beautiful simplicity of this blade, the colors of the edge are divided in perfect equality. The inner bo-hi is a deep black, while the outer ha, or edge, is a shining white. The blade curves slightly towards the end, with a stunning sharp tip that cuts through foes. The sheath represents a peaceful harmony, being completely white with a modest kojiri at the end.
It is described as "magnificent" by Tashigi when it catches her eye in Loguetown.
As the masterpiece of the legendary swordsmith, Shimotsuki Kozaburo classified as one of the 21 Great Grade swords, Wado Ichimonji is one of the most powerful swords in the world described by Tashigi, a sword fanatic, as a magnificent katana of the highest caliber. It is most notably extraordinarily durable, able to withstand strikes from Dracule Mihawk's Yoru, a Supreme Grade sword, which shattered his two other swords, cut large battleships, and a giant iceberg; it could even defend against strikes from another Great Grade sword, Shusui, wielded by Shimotsuki Ryuma, for a period of time. These are notable feats as Yoru and Shusui are renowned black blades, and Wado Ichimonji was not imbued with Haki at the time. When fully mastered, Wado Ichimonji managed to wound Kaido, giving him a second permanent scar.
Tashigi of the Marines was hunting Zoro for this very blade since she could not accept the fact that such a famous blade is in the hands of a pirate. However, while he has allowed others to examine it, Zoro refuses to ever give this blade up to anyone. Both its toughness and sharpness is further demonstrated by the fact that Zoro used it for his Ittoryu Iai: Shishi Sonson technique against Mr. 1, cutting through his steel body.
Zoro prefers to place Wado Ichimonji in his mouth when using his Santoryu, though prior to the timeskip, he uses it when using his Ittoryu in some battles. After the timeskip, he appears to favor Shusui when using his Ittoryu.
Sometime in the past, Wado Ichimonji was created by Shimotsuki Kozaburo. When Kozaburo left Wano, he took his handcrafted Meito sword with him. The sword was carefully stored in the warehouse of the Isshin Dojo rarely used as Koushirou does not have any need to use it for combat as his dojo used only wooden swords to train and teach his students. Once, Roronoa Zoro, a student of the Isshin Dojo and rival to Koushiro's daughter Kuina, challenged the girl to a fight with real swords. Kuina then borrowed Wado Ichimonji for this fight.
After Kuina's death, the sword was in the possession of her father, Koushirou. Zoro declared to Koushirou that he will become the strongest swordsman in the world and asked for the sword. Koushirou accepted his request and passed on Wado Ichimonji to his second-best student.
Zoro was left with only Wado Ichimonji after two of his swords were broken in his fight with Dracule Mihawk. After arriving at Loguetown, he went into Ipponmatsu's arms shop to buy two more swords. The owner of the shop recognized Wado Ichimonji and asked Zoro to see the blade. Ipponmatsu tried to fool Zoro to sell his sword for a hefty price, but Zoro refused to sell it for any price.
Later, when Tashigi found out about Zoro's true identity, she vowed to defeat him and retrieve the Wado Ichimonji from him.
Wano Country Arc
- In SBS Volume 92, Oda drew Zoro's swords personified as humans. Wado Ichimonji took the form of a man with a thick unibrow, large nose and lips, and dark hair fashioned into a topknot.
- One Piece Manga and Anime — Vol. 11 Chapter 97 (p. 8) and Episode 49, Tashigi classifies Wado Ichimonji's grade and value.
- SBS One Piece Manga — Vol. 13.
- One Piece Manga and Anime — Vol. 57 Chapter 561 (p. 6-7) and Episode 470, Mihawk slices through an enormous iceberg's top.
- One Piece Manga and Anime — Vol. 12 Chapter 100 (p. 10) and Episode 53, Tashigi declares to Zoro that she will take Wado Ichimonji from him.
- One Piece Manga and Anime — Vol. 21 Chapter 195 (p. 19-21) and Episode 119, Zoro defeats Mr. 1 with Shishi Sonson.
- One Piece Manga and Anime — Vol. 95 Chapter 955 (p. 16-17) and Episode 956, Hitetsu reveals that Zoro is able to get used to Enma due to Wado Ichimonji
- SBS One Piece Manga — Vol. 92 (p. 76), Zoro's swords personified.