Big Brother Choso

Big Brother Choso is the family ship between Choso and his brothers Yuji Itadori, Eso, Kechizu, Noranso, Sho-so, Tanso, Sanso, Kotsuso and Shoso from the Jujutsu Kaisen fandom.

Meiji Era
Kenjaku, in Noritoshi Kamo's body, forced a woman to have nine pregnancies and nine abortions with a cursed spirit, resulting in the births of Choso, Eso, Kechizu, Noranso, Sho-so, Tanso, Sanso, Kotsuso and Shoso. The nine aborted fetuses became nine special grade cursed objects, the Cursed Womb: Death Paintings. For 150 years, with only the faintest notion of each other's existence, the Death Paintings survived sealed away. At some point into the future, Tokyo Jujutsu High was able to secure them into their facilities.

2003
Kenjaku, in Kaori Itadori's body, had Yuji with Jin Itadori, making Yuji the youngest of the ten siblings.

Death Painting Arc
Mahito stole three Death Painting Wombs from Jujutsu High: Choso, Eso and Kechizu. After the Death Paintings are incarnated into human bodies, they discuss theirs plans for the future. Choso tells his brothers that they'll side with the Disaster Curses as their plan will be the most beneficial for them. Choso tells them that they will live for each other and that they are one. Eso will live for Kechizu, Kechizu will live for Choso and Choso will live for Eso.

Nobara Kugisaki, Yuji, Eso and Kechizu get into a fight. As he watches Kechizu die, Eso apologises to Choso for not being able to protect their brother. After Nobara kills Eso, Choso, who is playing a board game, breaks a piece he was holding as he senses his younger brothers are dead. Choso doesn't believe his brothers could be killed by a cursed spirit possessing only a single Sukuna finger. Kenjaku confirm his theory by telling him his brothers were killed by Yuji and his classmates.

After Eso and Kechizu's deaths, Yuji talks to Nobara. He feels bad for killing them because they were half-human and because Eso cried for Kechizu who died in front of him.

Shibuya Incident Arc
On October 31st, Choso plans to avenge his brothers, Eso and Kechizu, by killing Yuji and Nobara and to retrieve his other siblings from Tokyo Jujutsu High. Choso decides that if he meets Yuji before Mahito and Jogo, then he will kill him. Later, Choso encounters Yuji and attacks him. Choso asks Yuji if his brothers left any final words for him. When Yuji says that they cried, Choso becomes angry with his response and prepares to continue fighting Yuji. Mechamaru and Yuji lure Choso to the bathroom. Mechamaru provokes Choso by telling him that he's a coward, just like his brothers, enraging him. He keeps going by saying that Choso is like his brothers: easy to manipulate because of their love for each other. Choso manages to knock Yuji out and, just as he is about to kill Yuji, he tells him to ask for his brothers forgiveness when he'll get to the other side. However, Choso stops when a memory appears in his head. Choso is confused about this memory and leaves the area.

Choso is confused because of the "memory" he saw. He saw Eso, Kechizu and his 6 other siblings having peaceful meal with Yuji who was one of his younger brothers. Part of Choso's Cursed Technique is to feel when his brothers are about to die and, as he felt Yuji dying, Choso becomes convinced that Yuji is also one of his siblings and rushes to his side. Choso arrives on the battlefield and confronts Kenjaku, he asks why he made him try and kill his "little brother Yuji" and rushes towards him. Choso prepares to fight to protect Yuji and tells Kenjaku that there is no reason not to put his life on the line for his little brother. Yuji asks if Choso is their ally, but Choso says no, telling him he's his older brother and asks Yuji to try calling him "older brother".

Itadori's Extermination Arc
Choso approaches Yuji and asks about his injuries. Choso says that he will be fine by himself while he collects the remains of his other brothers, telling Yuji that he can return to Jujutsu High. Yuji, however, reminds Choso that he killed both Eso and Kechizu, his younger brothers. Choso calmly says that it was a misunderstanding and that forgiveness isn't involved when it comes to brothers. The pair then heads out to deal with the rest of the cursed spirits.

Yuji and Choso fight cursed spirits together. Choso takes note of Yuji's improvement and he tells his "little brother" he's very impressive. Yuji asks him if he's still going to call him that and Choso explains that he will continue to refer to Yuji as "little brother" until Yuji remembers that Kenjaku is both their father.

Naoya Zenin and Yuta Okkotsu appear and state their intentions to kill Yuji. Choso tells Yuji to run away and the two are separated. Yuji fights Yuta and Choso fights Naoya. Choso tells Naoya that maybe he owes everything to his brothers. He explains that, as the oldest, his bad decisions are examples for his brothers and his good choices allow his brothers to join him themselves. Choso tells Naoya that he is strong because of his brothers. Choso then overpowers Naoya with his Blood Manipulation and tells him he cannot understand how Naoya can hate his brothers.

Suddenly from behind Choso, Yuta appears, dragging a limp Yuji behind him. Choso turns around in confusion but is knocked unconscious by Yuta. While Yuji is unconscious, he has a dream that shows him that Kenjaku his indeed his parent, making him understand that Choso really is his brother.

Perfect Preparation Arc
Choso tells Yuji, Yuta and Megumi Fushiguro that there may be some way to get past the barrier because Mahito once managed to steal Sukuna's fingers along with the Death Paintings and that they can do the same. The group arrives at Tokyo Jujutsu High. They find Yuki Tsukumo and Maki Zenin there. Choso tells the group that they can get past Tengen's barrier because he can locate his brothers with his cursed technique. When Maki asks who Choso is, Yuji says to think of him as his older brother which surprises Choso.

Choso guides the sorcerers through the barrier and retrieves his other siblings from the warehouse they were stored in. After Tengen explains the situation, Choso decides to stay behind to protect Tengen. Choso tells Yuji he needs to protect Tengen from Kenjaku as ending his life would mean salvation for his little brothers. Before leaving, Yuji thanks Choso who tells him not to die. After Yuji and the rest of the group leave and Choso is left with Yuki and Tengen, he covers his eyes with his hand which prompts Yuki to ask if he is crying.

Culling Game Arc
Choso tells Yuki he wants Kenjaku to die for his sake and his brothers'. In another conversation, Yuki tells Choso that there is no point in him dying for his brothers if he isn't there to live alongside them. Choso tells Yuki that he chose to side with the Disaster Curses because he realised humans would never accept his brothers because of their abnormal bodies. He tells Yuki that he feels responsible for Eso and Kechizu's deaths because, had he chosen to side with the humans, his little brothers wouldn't have had to kill each other. He cries and says he chose the easy way out because he didn't want to his brothers in pain from living as "humans" but now Yuji is in pain from living as a human. He wish the four of them could have fought together but Yuji was left alone because of his choices. He then says he has no longer the right to live besides Yuji.

Choso faces off against Kenjaku who says him and his little brothers were disappointments. Choso tells him he will die if insults his brothers again. Choso then asks Kenjaku what he wants to do with Yuji. He tells Kenjaku that he abandonned him and his brothers for 150 years but Yuji must be different. Choso doesn't like his answer as Choso doesn't like Kenjaku insulting his little brothers.

As he is about to be defeated by Kenjaku, Choso thinks that he can't let him say his little brothers aren't fascinating. Thinking of his brothers gives choso strength and he takes inspiration from them. Choso imitates Eso's Wing King to become faster. Choso says he strikes Kenjaku elegantly like Eso, freely like Kechizu and powerfully like Yuji.

Choso is reunited with Yuji and gives him a book written by Yuki. Yuji is worried about their siblings but Choso says they'll live inside him. Choso watches alongside Yuji and the other sorcerers as Hana uses Jacob's Ladder on the Prison Realm.

Shinjuku Showdown Arc
Sometime before the fight, Choso trained Yuji on how to use Piercing Blood. Days later, Choso and Yuji watch Gojo's fight against Sukuna next to each other. After Satoru Gojo dies, Yuji, Choso and the other sorcerers fight against Sukuna together.

Fanon
is a rarepair within the Jujutsu Kaisen fandom as the main tag for the ship has only 11 works under its tag on Archive of our Own. However it is much talked about within the fandom because, as of chapter 222, there is speculation that Yuji ate his Death Paintings brothers to use their cursed technique.

Fandom

 * FAN FICTION

Variations

 * ChosoIta refers to the ship between Choso and Yuji Itadori
 * Esizu refers to the ship between Eso and Kechizu