One Piece School

One Piece School is a One Piece spin-off manga by Sohei Koji. It has been published in Saikyo Jump since August 2019. Its first physical volume was published on April 3, 2020.

Since April 8, 2022, the series is also available on Shōnen Jump+. New chapters are published on Shonen Jump+ in two parts: the first half at the beginning of a month, and the second half in the middle of a month. Saikyo Jump continues to publish full chapters at the beginning of every month.

Premise
The premise of this manga involves various characters from One Piece being placed in a school setting. Koby is a student who transfers into the same class as Monkey D. Luffy, which is taught by their homeroom teacher Aokiji.

New World Middle School
New World Middle School (新世界中学校) is the school that Koby and his friends attend, located in Grand City (グランド).

Ohimegaoka Junior High School
Ohimegaoka Junior High School (王姫ヶ丘中学校) is a prestigious junior high school, exclusive enough that someone's transfer there is debated at the "Council of the World's Top Influential Families" (also known as the Levely).

Death Boys Music School
Death Boys Music School (デスボーイズ音楽中学校) is a music school, outside Grand City. The only known student is Brook.

Kuja Girls Junior High
Kuja Girls Junior High (九蛇又予中学校) is a girls-only junior high school. Despite it being a separate school, one of its students is still considered one of New World Middle School's "7 Seniors". The school can drive, both in water and on land.

South Grand Primary School
South Grand Primary School (グランド南小の) is a primary school that Eustass Kid and Killer used to attend.

Characters
Characters appearing in One Piece School are caricatures of their main series counterparts, usually in their pre-Timeskip forms, and retain their abilities. High-ranking Marines usually represent teachers, while pirates are students and CP9 is the student council.

Below is a full list of characters that have appeared in the series, ordered alphabetically. Characters are listed using aliases used in One Piece School:

Teachers

 * Attach
 * Bastille
 * Mr. Borsalino Kizaru (2nd Year Student Affairs Manager)
 * Brannew
 * Dalmatian
 * Doberman
 * Gaimon
 * Mr. Kuzan Aokiji (Class 1-1 Head Teacher and 1st Year Student Affairs Manager)
 * Lonz
 * Momonga
 * Monkey D. Garp
 * Onigumo
 * Pudding Pudding
 * Mr. Sakazuki Akainu (3rd Year Student Affairs Manager)
 * Sengoku (Principal)
 * Shu
 * Smoker
 * Stainless
 * Strawberry
 * T Bone
 * Terracotta
 * Yamakaji

Student Council
The student council is a group of students who are dedicated to "protecting the rules" of New World Middle School. They are authorized, both through the school and the law, to use violence to enforce these standards, and have the ability to suggest suspensions to the principal, which are usually accepted.
 * Blueno
 * Fukurou
 * Hattori
 * Jabra (Vice-President, former temporary President)
 * Kaku (Vice-President)
 * Kalifa (Secretary)
 * Kumadori
 * Rob Lucci ("Hyouta Hattori" (ヒヨウくん)) (President)
 * Spandam (Advisor)

Class 1-1

 * Babe
 * Brook (formerly)
 * Buggy
 * Cabaji
 * Chew
 * Fullbody
 * Hatchan
 * Jango
 * Jinbe
 * Koby
 * Kuroobi
 * Masira
 * Miss Monday
 * Mohji
 * Monkey D. Luffy ("Mr. 5686")
 * Mr. 9
 * Nami
 * Nefertari Vivi (Class Monitor)
 * Nico Robin
 * Richie
 * Risky Brothers
 * Roronoa Zoro
 * Sanji
 * Tony Tony Chopper
 * Usopp ("Mr. 800")
 * Zambai
 * Franky

Class 1-2

 * Kumashi
 * Perona

Class 1-3

 * Scratchmen Apoo

Class 1-4

 * X Drake

Class 1-5

 * Jewelry Bonney

Class 1-6

 * Bepo
 * Jean Bart
 * Penguin
 * Shachi
 * Trafalgar D. Water Law

Class 1-7

 * Capone Bege
 * Vito

Class 1-8

 * Urouge

Class 1-9

 * Basil Hawkins

Class 1-10

 * Eustass Kid
 * Heat
 * Killer
 * Wire

Unknown Class

 * Bellamy
 * Buchi
 * Chess
 * Dosun
 * Gem
 * Gin
 * Hamburg
 * Krieg
 * Kuromarimo
 * Pearl
 * Sarkies
 * Sham

Class 2-6

 * Blueno
 * Fukurou
 * Jabra
 * Kaku
 * Kalifa
 * Kumadori
 * Rob Lucci

Unknown Class

 * Arlong
 * Chaka
 * Enel
 * Miss Doublefinger
 * Mr. 1
 * Pell
 * Shyarly

Class 3-3

 * Wanda

Class 3-9

 * Crocodile
 * Dracule Mihawk

Unknown Class

 * Atmos
 * Blamenco
 * Blenheim
 * Blondie
 * Islewan
 * Donquixote Doflamingo
 * Izou
 * Jozu
 * Rakuyo
 * Skull
 * Squard
 * Viola
 * Whitey Bay

Unknown Year

 * Bomba
 * Caesar Clown
 * Conis
 * Dalton
 * Foxy
 * Gatz
 * Gecko Moria
 * Gedatsu
 * Gyaro
 * Haritsu Kendiyo
 * Helmeppo
 * Hotori and Kotori
 * Itomimizu
 * Johnny
 * Kamakiri
 * Kiev
 * Koza
 * Kuro
 * Lassoo
 * Macro
 * Marco
 * Marguerite (Formerly)
 * Marianne
 * Merry
 * Mikita
 * Minochihuahua
 * Minotaurus
 * Miss Friday
 * Monda
 * Mozu and Kiwi
 * Mr. 13
 * Nero
 * Peepley Lulu
 * Pekoms
 * Ohm
 * Pike
 * Porche
 * Raki
 * Risky Brothers (Zombies)
 * Roshio
 * Satori
 * Senor Pink
 * Shoujou
 * Shura
 * Spandam
 * Tansui
 * Tightrope Walking Funan Bros
 * Tilestone
 * Wanze
 * Wyper
 * Yosaku

Teachers

 * Mrs. Elder Nyon (Principal)

Third Year

 * Boa Hancock
 * Boa Marigold
 * Boa Sandersonia

Unknown Year

 * Aphelandra
 * Cosmos
 * Daisy
 * Kikyo
 * Marguerite
 * Ran
 * Rindo
 * Sweet Pea

Other Students

 * Alvida (Unnamed middle school)
 * Bartolomeo (Unnamed primary school)
 * Heppoko (Unnamed middle school)
 * Koala (Second year student at unknown school
 * Peppoko (Unnamed middle school)
 * Poppoko (Unnamed middle school)
 * Portgas D. Ace (Second year student at unknown school)
 * Sabo (Second year student at unknown school)

Other Characters

 * Boo
 * Boodle}}
 * Chicken
 * Chimney
 * Chinjao
 * Chouchou
 * Cocox
 * Curly Dadan
 * Genbo
 * Gonbe
 * Gyoru
 * Igaram
 * Ipponmatsu
 * Jalmack (Congressman)
 * Karoo
 * Kokoro
 * Lionbuta
 * Minatomo
 * Moda
 * Moodie
 * Mr. 7
 * Nefertari Cobra
 * Ninjin
 * Onigiri
 * Pappag
 * Piiman
 * Pinky
 * Sai
 * Shelly
 * Su
 * Tamanegi
 * Tonjit
 * Zeff (Former New World Middle School student)

Below is a list of animal species that have appeared in the series:
 * Bananawani
 * Blue Gorillas
 * Den Den Mushi
 * Elephant Tuna
 * Hiking Bear
 * Humandrills
 * Kraken
 * Kung Fu Dugong
 * Sea Kings (Momoo)
 * South Bird

Chapters not yet published in volume format
The following chapters have appeared in Saikyō Jump but have yet to be reprinted in tankōbon format.
 * 019. School Has Started (学校は始まった)
 * Luffy allows Sanji and Zoro to continue fighting, only stopping Buggy's interference. When they've finished, the three of them along with Nami and Usopp vow to be friends. Back in the present day, Koby notices that most people act the same as at their entrance ceremony, though he remarks that Buggy has gotten nicer.
 * 020. Big Brother is a Worrier (お兄ちゃんは心配性)
 * Luffy forgets his gym uniform, so his brothers, Sabo and Ace, go bring it to him. They run into various students on the way, and Sabo helps to save somebody from a collapsing building.
 * 021. Rumored Wicked Girl (噂の悪女)
 * Koby hears rumors about Robin dating Mr. Kuzan Aokiji, and decides to investigate. He quickly discovers that she's seemingly also dating Trafalgar Law, Eustass Kid, Rob Lucci, and Crocodile, not knowing how to react. Chopper avoids answering when he's asked about it, and Robin is suddenly confronted by Spandam, with Koby watching. However, she suddenly reveals that they had actually been planning a surprise birthday party for Koby and Luffy, and she had been inviting the different students.
 * 022. Café Baltigo (カフェ バルティゴ)
 * 023. White-Bearded Old Man (白いひげのおっさん)
 * 024. The Town's Charisma, Joker (街のカリスマジョーカー)

Trivia

 * Marguerite was originally shown as a New World Middle School student, but was later a student at Kuja Middle School