Kenjaku in Jujutsu Kaisen: The Ancient Sorcerer Behind Everything Explained

Kenjaku is one of the two primary antagonists of Jujutsu Kaisen alongside Ryomen Sukuna. He is an ancient curse user who has survived for over a thousand years by transplanting his brain from one human body to the next, inheriting each host’s memories, cursed energy, and technique. He has been alive since at least the Heian Era. His original body is unknown. He is identified only by the horizontal scar of stitches that circles the top of every body he inhabits.

His name means “compassion and salvation” in kanji. Yuki Tsukumo pointed this out to his face and called it sarcastic. He did not argue.

Character Profile

Who Is Kenjaku?

Kenjaku is the architect of every major catastrophe in Jujutsu Kaisen. The Shibuya Incident, the Culling Game, the Death Paintings, the awakening of a thousand new sorcerers, and Yuji Itadori’s very existence are all results of plans Kenjaku has been executing across centuries.

He appeared throughout the series disguised as Suguru Geto until the Shibuya Incident, when he opened Geto’s skull in front of Gojo to reveal his brain beneath. The brain has a mouth. The brain can talk. That is how Kenjaku introduces himself to the person he is about to seal.

He is not motivated by hatred of humanity or desire for power in the conventional villain sense. He wants to know the true potential of cursed energy in a being. He believes creating uncontrollable chaos is the best experimental method. He told Choso directly that he plans to merge all of Japan’s citizens into a single entity simply because it seems interesting to him. That is the full scope of his philosophy.

What Is Kenjaku’s Innate Technique?

Kenjaku’s innate technique allows him to transplant his brain into a dead human body, take complete control, and access that person’s memories, cursed energy, and cursed technique while retaining all techniques from every previous host.

When Kenjaku takes a new body he heals every wound on it using Reverse Cursed Technique. He leaves one wound alone: the horizontal scar circling the crown of the head where the transplant was performed. Leaving this scar is a binding vow built into the technique. He cannot hide the mark. Every body he has ever inhabited carries it.

The technique only works on human bodies, not cursed spirits. The previous host’s cursed technique should theoretically disappear when the brain is replaced, but Kenjaku has developed methods to circumvent this, which is how he retains accumulated techniques across bodies.

His brain is not ordinary brain matter. It has teeth. It can speak.

Accumulated Techniques

Across his thousand-plus years of body-hopping, Kenjaku has accumulated several techniques from notable hosts:

Cursed Spirit Manipulation — obtained from Suguru Geto’s body, his current vessel. This allows him to capture, store, and weaponise cursed spirits using a cursed energy-imbued sphere. He can deploy stored spirits as weapons or combine them into the Maximum: Uzumaki, which releases all stored curses simultaneously as a concentrated blast and extracts their techniques. He used Uzumaki to absorb Mahito after Shibuya.

Anti-Gravity System — obtained from Kaori Itadori, Yuji’s mother. This allows him to negate gravity around himself, float freely, or reverse the technique to increase gravitational pull and crush opponents into the ground.

Idle Transfiguration — obtained by absorbing Mahito through Uzumaki after the Shibuya Incident. This allows him to reshape souls directly, with all of Mahito’s applications including remote activation across distances. He uses this immediately after absorbing Mahito to remotely mark thousands of people across Japan for the Culling Game, adjusting their brains for sorcery and awakening them as participants without ever touching them individually.

Domain Expansion: Womb Profusion

Kenjaku’s Domain Expansion is barrierless like Sukuna’s Malevolent Shrine. When activated it generates a grotesque totem pole of cursed spirits with their heads protruding outward, which release powerful blasts at intervals. He uses it only once in the manga, during his fight against Yuki Tsukumo and Master Tengen.

What Bodies Has Kenjaku Inhabited?

Kenjaku has inhabited at least four confirmed bodies across the timeline of Jujutsu Kaisen, each chosen deliberately for a specific technique or strategic purpose.

Unknown Body (400 years before Shibuya)

The oldest confirmed image of Kenjaku shows him in an unidentified body approximately 400 years before the main story, using it to make binding vows with sorcerers of that era. No name is known for this vessel.

Noritoshi Kamo (approximately 150 years before Shibuya)

Kenjaku took the body of a member of the Kamo Clan, one of the three great sorcerer families. Under the name Noritoshi Kamo, he conducted human experiments so vile that all official records were destroyed and the real Noritoshi Kamo became known throughout jujutsu history as the most evil sorcerer to have ever lived.

During this period he imprisoned a woman who could bear a curse-human hybrid child and created the nine Cursed Womb: Death Paintings, mixing Noritoshi’s blood with the children’s to give them the Kamo Clan’s Blood Manipulation technique. Choso, Eso, and Kechizu are his creations from this era.

Kaori Itadori (modern era)

Kenjaku took the body of Jin Itadori’s partner, Kaori. While in her body he had a child with Jin, specifically because Jin’s father was the reincarnated twin of Sukuna, making any child born from this union a natural vessel candidate. On March 20, 2003, Kenjaku gave birth to Yuji Itadori. He also sealed one of Sukuna’s fingers inside Yuji at birth, engineering Yuji’s role as Sukuna’s vessel from the moment of his creation. Yuji was not an accident. He was a project.

Suguru Geto (current vessel)

Geto was killed by Gojo at the end of Jujutsu Kaisen 0. His body was not cremated. Kenjaku transplanted his brain into Geto’s corpse specifically to acquire Cursed Spirit Manipulation, which he identified as essential for the Culling Game plan. He then spent years operating as Pseudo-Geto, building alliances with the disaster curses and setting the conditions for the Shibuya Incident.

What Is Kenjaku’s Plan?

Kenjaku’s plan is to force Master Tengen to merge with the entire population of Japan, creating a new form of collective existence powered by cursed energy, purely to observe what that produces.

He spent over a century marking and preparing. He sabotaged Tengen’s 2006 Star Plasma Vessel merger, leaving Tengen in an unstable evolving state that made the forced merger possible. He spent years awakening sorcerers across Japan. He designed the Culling Game as a ritual to generate the concentrated cursed energy needed to power the merger. He structured the game’s rules specifically so that killing him could not end it.

He told Yuki Tsukumo that humanity’s next step was optimising cursed energy rather than discarding it. He told Choso it seemed like fun. Both answers are true simultaneously.

What Happens to Kenjaku in the Story?

Kenjaku executes the Shibuya Incident, activates the Culling Game, reaches Tengen, kills Yuki Tsukumo, and is killed by Yuta Okkotsu before the plan fully completes.

Shibuya Incident

Kenjaku’s role in the Shibuya Incident is primarily strategic and his one decisive action: sealing Gojo in Prison Realm. He uses the one-second thought window the technique requires by appearing as Geto — Gojo’s dead best friend — causing Gojo to freeze for exactly long enough. The seal closes. Kenjaku’s most dangerous obstacle is removed.

He then absorbs Mahito after Yuji defeats him, acquiring Idle Transfiguration, and immediately uses it remotely to mark thousands of people across Japan for the Culling Game.

Culling Game to Final Arc

Kenjaku adds his own rules to the Culling Game in the closing stages, locking the end conditions and giving Megumi the authority to activate the Tengen merger. He fights through Yuki and Choso’s combined defence at Tengen’s location, kills Yuki through an extended battle that costs her life, and captures Tengen.

He is then found by Yuta Okkotsu. He fights Takaba during the Shinjuku Showdown, a fight that forces him to sustain injuries because Takaba’s technique makes things genuinely funny, and comedy is a binding vow mechanism he cannot ignore. After Takaba falls, Yuta engages him directly. Yuta copies Kenjaku’s own technique against him, using a Reverse Cursed Technique application Yuta had acquired during the battle. Kenjaku is killed.

After his death Rika eats his brain, preventing any further body-hopping. His thousand-year run ends in Shinjuku.

What Does Kenjaku Represent?

Kenjaku is the manga’s purest expression of what happens when intelligence operates entirely without conscience, curiosity replaces ethics, and a thousand years of living produces nothing that resembles a reason to care about other people.

He engineered Yuji’s birth. He created the Death Paintings. He is responsible for every death in Shibuya. He looks down on the cursed spirits he allies with. He feels no loyalty to anyone. He does not hate humanity — he simply finds it interesting as experimental material and is willing to sacrifice millions of people to see what the results look like.

The final irony is that his plan, even partially executed, changes nothing in a positive direction. The merger does not happen. The chaos he creates is resolved not by him but by the sorcerers who survive everything he orchestrated. He spends over a thousand years building toward a conclusion and dies before he sees it.

For more on the events he triggers see the Shibuya Incident page and the Culling Game Arc page.