KenJin

 is the non-binary ship between Kenjaku and Jin Itadori from the Jujutsu Kaisen fandom.

Canon
As they've only appeared in three panels in one chapter together, not much is known about the pair. However it is know that they are Yuji Itadori's parents.

Jin was married to Kaori Itadori and really wanted a child with her, however she died. At somepoint, Kenjaku stole Kaori's body and had a child with Jin. Jin's father, Wasuke, was suspicious and tried repeatedly to warn Jin about Kenjaku, saying that he should give up on that woman or that he'll die. Jin did not want to hear his father talk badly of Kenjaku, especially not in front of Yuji. Jin loved the child they had together very much. Jin possibly dies before 2018, when the story begins.

Fearsome Womb Arc
During his final hours in the hospital, Wasuke proceeds to attempt to reveal something to Yuji about his parents but Yuji refuses to hear him out.

Itadori Extermination Arc
While he is unconscious, Yuji dreams about his parents and learns that Kenjaku was indeed his parent.

Culling Game Arc
It is revealed that Kenjaku stole Kaori's body to steal her cursed technique. Even so, it is still not clear why he chose to have a child with Jin. He pressumably wanted to make Yuji a vessel for Sukuna but it is not known if it was his goal from the beginning.

Fanon
has 50 works written for it on Archive of our Own. It is Jin's most popular pairing, more popular than his pairing with Kaori. It is also Kenjaku's fourth most popular pairing, behind GoJaku or Mommy Kenny.

As it is not yet know why kenjaku chose to pretend to be Kaori, to enter a relationship with Jin and to have a child with Jin, many fans like to joke about the relationship. As Kenjaku and his plans are the main architects behind the story of Jujutsu Kaisen, fans like to joke that "he'll do anything for his plans". Kenjaku main motive throuhought the story is to experiment and have fun, it is possible that's the reason behind his relationship with Jin. That being said, some fans wonder if he ever developped genuine feelings for Jin. Likewise, fans wonder if Jin was willing to ignore Kenjaku being in Kaori's body because he really wanted a child or if it was because he really loved Kaori.

Fandom

 * FAN FICTION