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Udon is a region located at the southeast of Wano Country currently under the rule of the All-Star Queen of the Beasts Pirates. It is an industrialized region of weapon factories where the lower-class are forced to work to exhaustion and death.


Prisoner MineEdit

For the chapter of the same name, see Chapter 926.
The #1 rule in Wano Country's Prisoner Mine is as follows:
If you talk back to a guard you will be punished.
The punishment for the first offence: dismemberment of both of your arms.
The punishment for the second offence: dismemberment of both of your legs.
And the punishment for the third offence: execution!!
Futhermore... if one lays a single hand... on one of the guards... they will immediately be... executed!!
— Prisoner Mine's rule[2]

Prison Mines

Layout of the Prison Mines.

The Prisoner Mine (囚人採掘場 Shūjin Saikutsujō?) is where rebels are tortured until their wills break and they pledge allegiance to Kaido.[1]

The Prisoner Mine is divided into six parts: the central fortress and the five labor camps surrounding the the fortress. This layout gives the Prisoner Mine an appearance similar to a blooming flower. It appears that each labor camp has a different purpose: the first being a stone mine; the second being an ironworks; and the other three unknown.[3]

Although there are tens of thousands of prisoners currently entombed into the prison, most of them are guilty of rebellion against Kurozumi Orochi, which, in Hyogoro's opinion, was effectively Orochi gathering an army against himself.[4]

Prisoner Stone Mine[citation needed]Edit

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Prisoner Iron Factory[5]Edit

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[v · e · ?]
Prisoner Mine Staff
Babanuki Dobon Daifugo Solitaire Alpacaman
Prisoner Mine Prisoners
Kawamatsu Hyogoro Caribou Eustass Kid Monkey D. Luffy
Killer ????? ????? ????? ?????


There are tens of thousands of prisoners here in Udon!! However not all of them are arrested for theivery and assault, most of the prisoners's crimes here are rebellion against Orochi!!
— Hyogoro explained to Raizo about Udon.[4]

Twenty years ago, when the Beast Pirates took over Wano and Orochi rosed to power. Udon was converted into a  series of weapon factories which served as a labour camp, where all of Orochi's dissidents who openly rebelled against him are imprisoned and sentenced to harsh penal labour for life in Udon. Among them are the Yakuza Bossess including Hyogoro the most influential Yakuza himself. Thirteen years ago, Kawamatsu of the Nine Red Scabbards and one of the Kozuki Family's most powerful retainers was captured and imprisoned here. Unlike his fellow prisoners, Kawamatsu was not sentenced to harsh labour and was simply tightly tied up in his cell due to his immense fighting prowess which was deemed a significant threat. The Beast Pirates tried to weaken Kawamatsu into submission by feeding him poisoned fish daily but to no avail. Eustass Kid and Luffy was later imprisoned in Udon, Raizo who infiltrated Udon to liberate Luffy concidentally discovered Kawamatsu in his cell. Recruiting Caribou whose Numa Numa no Mi may be a useful asset, Raizo secretly approached Hyogoro and informed the latter of the upcoming revolution planned by Kinemon.

The anger of all the country has been gathered here!! The past Yakuza bosses who supported Wano from the shadows are also here!! If I speak to them, they will gladly fight in the Kozuki's Name!
— Hyogoro to Raizo[4]

Hyogoro Explains Udon Dissidents

Hyogoro explains that most of Orochi's dissidents are gathered in Udon.

Extremely happy to learned the Kozuki Revolution is still possible with the Nine Red Scabbards and Momonosuke being alive, Hyogoro explained to Raizo of the immense numbers of potential allies they could gained by recruiting all his fellow prisoners of Udon who are actually dissidents of Orochi, including his fellow Yakuza bosses and Kawamatsu himself.


  1. 1.0 1.1 One Piece Manga — Vol. 92 Chapter 924 (p. 12-15), Luffy is imprisoned in the Udon region.
  2. One Piece Manga — Vol. 93 Chapter 935 (p. 4-5).
  3. One Piece MangaChapter 947.
  4. 4.0 4.1 4.2 One Piece Manga — Vol. 93 Chapter 940 (p. 16).
  5. One Piece MangaChapter 947 (p. 8-9).

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