Kenjaku is one of the top‑tier threats in Jujutsu Kaisen, sitting just below monsters like Gojo and Sukuna but far above almost everyone else in terms of versatility, experience, and hax.

Overall power level

  • A thousand‑year‑old sorcerer with vast knowledge of jujutsu, curses, and barrier techniques, repeatedly portrayed as a “mastermind final boss” rather than a mid‑tier villain.
  • Recognized as one of the strongest barrier users, stated to be second only to Tengen in that specific field.
  • Capable of matching and pressuring special grade sorcerers like Yuki Tsukumo in direct combat, which places him firmly in the top bracket of the verse.

In raw “how strong is he?” terms: he is a special‑grade level threat with broken techniques and extremely high battle IQ who can hang with the strongest, though he is not on Sukuna/Gojo’s absolute ceiling.

Key abilities that make him dangerous

Body possession and longevity

  • Kenjaku’s signature technique is body‑snatching: he implants his brain into new hosts, effectively granting himself a form of immortality and letting him steal their innate potential.
  • Over centuries he has taken over powerful sorcerers, including Noritoshi Kamo and later Suguru Geto, stacking experience, knowledge, and techniques across eras.
  • This gives him incredible adaptability: he chooses hosts that push his plans forward and then fully exploits their abilities.

Cursed Spirit Manipulation

  • By taking over Geto’s body, he gains Cursed Spirit Manipulation, allowing him to collect, control, and combine large numbers of curses.
  • He can fuse spirits and create powerful constructs (like miniature “Uzumaki”‑type attacks) that deliver massive concentrated cursed energy.
  • This turns him into a one‑man army: he fights with both his own skill and a whole arsenal of high‑grade curses.

Gravity / Anti‑gravity techniques

  • Kenjaku can use the Antigravity System , an innate technique from one of his hosts (Kaori Itadori), to decrease, negate, or even reverse gravity in a radius around himself.
  • By applying reverse cursed energy, he can instead increase gravity, crushing opponents or massively hindering their movement for several seconds at a time.
  • This system is potent enough that he can ignore or counter extreme gravity effects, even those comparable to black hole‑like techniques.

Barrier and Domain expertise

  • Tengen describes him as the second strongest barrier specialist after themselves, which is a big statement in a verse where barriers and domains define top‑tier fights.
  • He can deploy advanced barriers (Curtains) that block detection or entry, and he uses domains in highly unorthodox ways, including using his own body as a domain to bypass some activation limits.
  • His barriers can be given rules and conditions, such as blocking certain people or nullifying some attacks, giving him situational control over the battlefield.

Physical prowess and combat skill

  • Despite being a “technique” and mastermind villain, he is also a master hand‑to‑hand fighter, fully capable of trading blows with special grades.
  • He overpowered Choso in pure physical combat, showing strong raw stats as well as technique.
  • Lifting/durability estimates from power‑scaling communities note he can resist Yuki’s black hole‑type attacks for some time, implying extremely high durability and strength for a human‑shaped sorcerer.

Regeneration and durability

  • Kenjaku uses high‑level reverse cursed techniques to heal even severe injuries like lost arms, and he has rapidly regenerated limbs destroyed in battle.
  • Only a tiny group of top‑tier sorcerers (Sukuna, Gojo, Yuta, Hakari, Higuruma) are noted as having comparable full‑limb regeneration capabilities, which implicitly places his healing in that highest bracket.
  • This regeneration makes it very hard to put him down with conventional damage unless you completely overwhelm him or bypass his healing.

Intelligence and planning (his real win condition)

  • His genius‑level intellect is arguably his strongest asset: Kenjaku’s plans span centuries, involving bloodlines, curses, national‑scale rituals, and global balance of power.
  • In combat, he quickly deduces the function and weaknesses of cursed techniques he has just seen, then counters them with precise tactics (for example, adapting to Yuki’s Star Rage and countering Choso’s attacks with boxing‑like head movement).
  • Fan discussions and analyses often frame him as the archetypal “mastermind final boss” whose real strength is putting himself in positions where he almost can’t lose.

Weaknesses and limits

  • Official Q&As and analyses imply that while he is extremely strong, he cannot simply overpower the absolute top monsters: he can’t just kill Gojo or take his body, and characters like Mahito and Jogo at full focus are not trivial for him to completely dominate.
  • His gravity techniques, while powerful, have time limits (around a few seconds of active use before needing to recharge), so he can’t spam maximum output continuously.
  • Many of his deadliest options require preparation, information, or specific conditions, so he is less “stand in the open and win” and more “set the stage and then crush you.”

How strong is Kenjaku in vs‑style terms?

If you think in “who beats who” terms:

  • Versus regular sorcerers and most special grades: he stomps. His toolkit, experience, and regeneration are overwhelming.
  • Versus top special grades (Yuki‑tier, high‑end Yuta discussions): he can fight on relatively even ground, especially with prep, gravity, and domains.
  • Versus peak ceiling (Gojo, full Sukuna): the consensus in official material and fan debates is that he is below them in pure combat power, relying instead on plotting around them.

Put simply: Kenjaku is “final boss of humans and curses,” terrifyingly strong and absurdly tricky, but the verse still reserves a higher, more broken tier for its absolute apex monsters.

Information gathered from public forums or data available on the internet and portrayed here.