Kenjaku’s Brain Hopping Technique In Jujutsu Kaisen, Explained

Kenjaku is one of the most dangerous characters in Jujutsu Kaisen — not because of raw strength alone, but because of his terrifying technique: brain hopping. This ability allows him to transfer his brain into another person's body and fully take them over, along with their voice, memories, and Cursed Techniques. The best part is that Kenjaku has used this to survive, plan in secret, and shape the jujutsu world from the shadows.

What makes Kenjaku so frightening is not only how, but what he does with this technique. By moving between powerful hosts, he gathers rare Techniques, forms alliances across eras, and sets large-scale events into motion. The best example of this is the Culling Game. So, here is everything you need to know about his Brain Hopping Technique.

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How Kenjaku’s Brain Hopping Works

Kenjaku’s Technique is simple to describe but terrifying in effect. He literally transplants his brain into another person’s skull and takes full control of their body. The stitched scar across the forehead marks this takeover.

Once inside, he can access the host’s Cursed Energy, Technique, and physical capabilities. This means if the host was a strong Sorcerer, Kenjaku keeps their strength while adding his own experience and Cursed Energy control on top.

Unlike a temporary possession, this takeover is complete. Kenjaku controls the body as if it were his own for as long as the body can function. He also uses the host’s social status and relationships because he can pretend to be them, manipulate others, and use their resources.

More importantly, if the body is about to fail or the situation gets too risky, he can simply move on to a new host, making it incredibly hard to kill him.

Power Boosts From Hosts And Techniques

A key part of this Technique’s power is inheritance. It means that when Kenjaku takes a body, he gains the host’s Technique and can push it further with his own skill. If the host’s body has a strong natural aptitude (physical toughness, Cursed Energy output, innate talent), he gains all of that instantly.

In practical terms, this means Kenjaku can switch from a strategist to a frontline fighter by simply choosing a different body. This flexibility also protects him from counterattacks. If someone finds a way to counter one of his Techniques, he can swap to a different host with a different style.

We can say that he is a moving target — changing forms, abilities, and tactics depending on the situation. As a result, that makes him one of the hardest enemies to plan against, because there is no single “anti-Kenjaku” strategy that will work in all situations.

Long-Game Planning: Experiments And The Culling Game

Kenjaku’s end goal is a large-scale evolution and control of Cursed Energy. Brain hopping gives him the time and tools to run experiments across generations — studying bloodlines, Techniques, and ways to fuse humans with Cursed Energy systems.

Unlike Sukuna, Kenjaku isn't just interested in winning fights, and instead wants to reshape the rules of the world itself. The Culling Game is the clearest example. By setting rules, reviving Sorcerers, and forcing battles, he creates a living lab that generates unnecessary battles and enormous Cursed Energy flows.

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All of this was only possible due to his Brain Hopping technique. He can basically lay the groundwork decades earlier under one identity, then activate the plan under another. Every move is patient, layered, and built on information and access he gathered through hosts.

Limits, Risks, And Trade-Offs

No matter how powerful it is, Kenjaku’s Cursed Technique isn’t perfect. A host’s body has limits like injuries, age, and exhaustion still matter. If a body is pushed past its boundary, performance drops, and he has to abandon it.

Some Techniques may also have conditions, restrictions, or compatibility issues that he must work around. Managing these trade-offs is part of why he plans so carefully. There’s also the risk of exposure. The stitched scar and sudden personality shifts can raise suspicion. Once people start looking for his signs, it gets harder to move forward quietly.

As a result, time is also a factor that can ruin his plans. The longer a plan stretches, the more chances there are for someone to find out about his identity. Even so, his track record shows he usually has backups like hosts, hideouts, and contingencies so that he can keep moving forward.

The True Power: Freedom To Rewrite The Board

In simple terms, the true power of Kenjaku’s brain hopping is freedom. Freedom from death, from time, from identity, and from a single fighting style. He can pick the right body for the right job, steal the best tools from history, and reset the game whenever he’s cornered.

So while most Sorcerers train to master one life, Kenjaku collects lives to master the world. And that is why he feels unbeatable. He does not rely on a single Technique or a single era, and rather uses centuries of stolen opportunity to design outcomes others can’t even see coming or think of.

To defeat someone like that, heroes need more than strength — they need to break the cycles he depends on, close the doors he keeps escaping through, and outlast the plans he set in motion long before they were born.

Release Year	MAL Rating	Animation Studio	Genre	Watch On
October 2020	8.56	MAPPA	Action, Supernatural	Netflix

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