GoJichi

"I'm just a guy who ran away. No, I didn't even have the courage to do that myself. Somebody else allowed me to run. Even then, the strongest man in world tells me that he trusts me. There's no way I could let him down. I will answer his trust even if it kills me."

- Ijichi while casting a barrier to hide Gojo's Hollow Purple attack from Sukuna

GoJichi is the slash ship between Satoru Gojo and Kiyotaka Ijichi from the Jujutsu Kaisen fandom.

Canon
Gojo and Ijichi both went to Jujutsu High at the same time with Gojo being Ijichi's upperclassman. Sometime during high school, Gojo told Ijichi to stop being a sorcerer because of his weakness. He also tells Ijichi to get a driver's license, encouraging him to become an assistant. Ijichi finds Gojo's actions tactless but acknowledges that he would've died if he hadn't listen to Gojo's recommendation.
 * MANGA

Cursed Child Arc
Ijichi informs Gojo about what happened during the mission. He then apologizes to Gojo for the inconvenience caused. Gojo responds that he was not to be blamed because the enemy was powerful. Ijichi then asks Gojo if he knew who the enemy was. It is implied Gojo does indeed know the identity of the culprit.

During the Night Parade of a Hundred Demons, Gojo and Ijichi were both in Shinjuku. Before the fighting started, Ijichi informs Gojo what he had found out about Yuta's lineage and tells him about his distant relation to Gojo. Once the war starts, Ijichi confronts two of Geto's sorcerers. As Ijichi prepares to fight, Gojo's fight with Miguel interrupts them. Ijichi watches the fight and notices that Gojo is angry, causing him to be worried.

Fearsome Womb Arc
While Gojo is away, Ijichi sends in Gojo's three students to rescue potential survivors of the cursed womb endangering a juvenile detention center. Ijichi explains the mission to the students and tells them Gojo is away on a business trip. He explains that Gojo should not be spending so much time at Jujutsu High because his strength is always needed elsewhere.

After Yuji is killed, Ijichi meets with Gojo and Shoko at the morgue. Gojo is angry about the situation and tells Ijichi he has a bad personality to which Ijichi agrees. Gojo tells Ijichi he'll slap him for agreeing, which worries Ijichi. Gojo explains that he has a dream to reset the jujutsu world and how he spends his time as a teacher despite not being qualified to being one because he wants train the next generation of students to be powerful allies in the coming battles. When Shoko is about to cut Yuji open in order to examine him, Gojo and Ijichi are shocked by Yuji suddenly reviving.

Later, Ijichi is driving Gojo to his meeting with Masamichi, when Gojo gets out and tells him to go on ahead. Nervous, Ijichi asks Gojo if he is being tested which displeases Gojo. Ijichi then heads off, while leaving Gojo behind. Later, Ijichi attends the meeting with Masamichi, and start to panic when Gojo is late.

Vs. Mahito Arc
When Yuji asks Ijichi why he hasn't been filled in on the grade system Ijichi thinks to himself that Gojo is an irresponsible teacher.

Culling Game Arc
During the Culling Game, Ijichi is willing to swap with Tsumiki in order to allow her to leave the game. He explains his reason for doing that by explaining that Gojo allowed him to run from being a sorcerer and he would have died if it wasn't for his intervention. However, Tsumiki revealed herself to be Yorozu's host who opted to stay as a player in the game.

After Gojo is unsealed, he has a talk with Ijichi and Shoko. He discovers Nanami's death and is bummed out they're the only three survivors from their high school days. Ijichi apologizes for Nanami's death stating that Gojo probably wish it was him instead which greatly displeases Gojo. Gojo tells Ijichi he still has a monumental task to give him.

Shinjuku Showdown Arc
It is finally the day of Gojo's fight with Sukuna, him and Ijichi are marching towards Shibuya. Ijichi asks Gojo about his time in the Prison Realm to which he responds he would never do it again which Ijichi understands. Gojo asks what happened to the people in B5 and is glad to hear no human was hurt by his domain expansion. Ijichi asks Gojo why he wanted his help when there are people more qualified than him at setting up barriers. Gojo responds that he wanted Ijichi's help because he's the man he trusts the most. Ijichi remembers Gojo allowing him to run and thinks to himslef that if Gojo, the strongest man alive, trusts him then he will answer his trust even if it kills him. Ijichi sets up a barrier to hide Gojo's Hollow purple attack from Sukuna, allowing him to land a surprise attack.


 * LIGHT NOVELS

Soaring Summer and Returning Autumn
After the events at the detention centre and Yuji's revival, Gojo gets sent on a mission for a few days. So he asks Ichiji to let Yuji stay at his apartment for a few days.

Quotes
"I think that saved my life. If Gojo hadn't said that to me, I would've become a half-assed sorcerer and died right away."

- Ijichi about Gojo telling him to quit being a sorcerer

Fanon
GoJichi is a rarepair within the Jujutsu Kaisen fandom. Fans ship them together because they have known each other for a long time. In canon these two characters have quite a complicated relationship. Gojo likes to bully Ijichi into doing things for him. For example, Gojo bullies Ijichi into quitting becoming a sorcerer which Ijichi is grateful for. Moreover Gojo can be callous and tactless with Ijichi wich leads him to interpret Gojo's intentions with malice. Despite this, Gojo doesn't like that Ijichi seems to think quite low of him. Gojo greatly trusts Ijichi, which is something Ijichi is surprised to learn.

Fandom

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Trivia

 * The chapter 8 extra about Ijichi states: "Sending students on dangerous missions, frequently getting into conflicts, being abused by Gojo and his other senior members- his heart can't take the stress much longer!"
 * According to the Jujutsu Kaisen Official Fanbook, Ijichi's main cause of stress is Gojo.