The connecting record
shownJujutsu Kaisen · ch. 124–125
Mahito beat Nobara Kugisaki in Jujutsu Kaisen.
What each of them is ranked on
The winner · 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.
Beaten · Nobara Kugisaki · rank 26
statedJujutsu Kaisen · ch. 5, p. 12-13
Resonance transfers damage through a piece of the target placed in a straw doll.
shownJujutsu Kaisen · ch. 123
Drives a nail into a fragment of a body Mahito had separated from himself.
shownJujutsu Kaisen · ch. 123
Mahito is visibly injured while she strikes the fragment rather than him.
All 5 citations
shownJujutsu Kaisen · ch. 124
Mahito touches her face and she collapses.
shownJujutsu Kaisen · ch. 268
Appears alive after the Shinjuku Showdown.
What this does not settle
One fight in one work. It is the only result the record gives between these two, 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.