The connecting record
shownJujutsu Kaisen
Kenjaku killed Mahito in Jujutsu Kaisen.
A first-year had already reduced him to a fragment that could not stand up; what arrives at the end absorbs the remainder.
What each of them is ranked on
The killer · Kenjaku · rank 3
Has worn a line of other people's skulls for something past a thousand years, most recently Suguru Geto's, and walked that face up to Gojo Satoru to shut him inside a box. Wrote the rules of the Culling Game and enrolled sorcerers in it who were given no say in the matter, then lost his head to a student who took the transplant technique off him and was wearing Gojo Satoru by the end.
statedJujutsu Kaisen · ch. 136
Kenjaku has moved his own brain from body to body across more than a thousand years.
shownJujutsu Kaisen · ch. 90
Wears Suguru Geto's body with a line of stitches running across the forehead.
statedJujutsu Kaisen · ch. 90
The stitching is explained as a brain placed inside the opened skull.
All 6 citations
shownJujutsu Kaisen · ch. 91
Closes the Prison Realm on Gojo Satoru at Shibuya station.
statedJujutsu Kaisen · ch. 143
Announces the Culling Game and the rules its enrolled players are bound by.
shownJujutsu Kaisen · ch. 243
Yuta Okkotsu severs his head.
The victim · Mahito · rank 10
Took Junpei Yoshino apart in front of Yuji and left him in a shape nobody undid. Killed Nanami Kento in a corridor of Shibuya Station with Yuji a few metres away and nothing left to do about it. Ten chapters on he put the domain up around Yuji and Aoi Todo — not the first time he had opened it — and the technique took hold of Todo without a hand ever landing on him.
statedJujutsu Kaisen · ch. 22
Mahito states that Idle Transfiguration reshapes the soul and the body follows it.
shownJujutsu Kaisen · ch. 27
Transfigures Junpei Yoshino's body in front of Yuji.
shownJujutsu Kaisen · ch. 27
Junpei Yoshino dies of the transfiguration.
All 10 citations
shownJujutsu Kaisen · ch. 120
Kills Nanami Kento in front of Yuji.
shownJujutsu Kaisen · ch. 29–30
Opens Self-Embodiment of Perfection against Kento Nanami, well before Shibuya.
shownJujutsu Kaisen · ch. 81–82
Opens Self-Embodiment of Perfection again against Kokichi Muta in Mode Absolute.
shownJujutsu Kaisen · ch. 130, p. 6-7
Opens Self-Embodiment of Perfection in Shibuya against Yuji Itadori and Aoi Todo, and uses Idle Transfiguration on Todo without touching him.
statedJujutsu Kaisen · ch. 30
Inside the domain his technique is said to reach a soul without his hand landing on it.
shownJujutsu Kaisen · ch. 132
Yuji Itadori beats him down to a fragment that cannot hold its shape.
shownJujutsu Kaisen · ch. 133
Kenjaku absorbs what is left of Mahito before the fight ends.
What this does not settle
One death in one work. It is the only place the record puts these two in the same room, and it is evidence about that meeting and nothing wider — not a general matchup, not a rematch, and not a ranking of its own.
The ladder above it is argued from everything either of them has been shown doing; this page is argued from one citation.
Where the two disagree, the disagreement is the point, and it stays visible rather than being resolved by whichever of them happens to be on this page.