[Jujutsu-Kaisen] Sukuna and Yuji have binding vow?What’s “Enchain”?

Jujutsu Kaisen Yuji and Sukuna Ryomen Sukuna

In this article, I will explain about the relationship between Yuji Itadori and Ryomen-Sukina of Jujutsu Kaisen, also their binding vow, contracts, and Yuji’s techniques.

Sukuna, the King of Curses, has not been able to incarnate any human being for more than 1000 years because of the power of his curse, but it has manifested itself in the present age with the appearance of a ‘vessel’ named Yuji Itadori.

Although they do not have an effective relationship, there are times when Sukuna’s immense power resolves things that are beyond the control of Yuji.

First of all, I will introduce the binding vow and relationships that Sukuna and Yuji have formed, in chronological order of the story.

What you can learn from this article
  • The binding vow and relations between Sukuna and Yuji
  • Yuji’s technique and memory manipulation

This article contains spiler of Jujutsu-Kaisen

See other Jujutsu Kisen articles

[Jujutsu-kaisen] Sukuna and Yuji’s bindings vow and Relationships

The encounter between Yuji and Sukuna is the biggest event that makes the world of Jujutsu Kaisen.

Sukuna, the King of Curses, has split into 20 fingers after his death, each of which has become a special grade charm.

The curse of those 20 fingers was getting stronger day by day, and modern shaman could not keep up with the sealing, but with the presence of Yuji Itadori, this situation changed completely.

First of all, I will explain how the relationship between Yuji  and Sukuna started, and the bindings vow that followed.

Yuji is a vessel of Sukuna! He incarnated by eating Sukuna’s finger.

The story of Jujutsu Kaisen starts with a finger of Sukuna kept in Sugisawa third high School in Sendai City, Japan, where Yuji goes to school.

The occult study group, to which Yuji belonged, broke the seal off Sukuna’s finger.

And then spellbound curses which caught by its magic power started to spring up in the school in large numbers.


Yuji is a vessel of Sukuna! He incarnated by eating Sukuna's finger.(C)Gege Akutami/Shueisha

As Megumi Fushiguro was the only shaman there, he was outnumbered by the amount of curses, but seeing the situation, Yuji swallowed Sukuna’s finger, saying, “It’s all right if I have the magic power, isn’t it?”.

If an ordinary person were to take in Sukuna’s finger, it would be just a deadly poison and he would die instantly, but since Yuji was a very rare ‘vessel’, born only once in 1000 years, Sukuna incarnated it.

This led to the manifestation of Ryomen-Sukuna in our time.

Sukuna lives in Yuji’s consciousness.

Normally, when a special grade charm incarnates in a human being, that human being will not retain any consciousness or original form, but will become what we call in the special grade curse, triggering a catastrophe.

However, for some reason, Sukuna is unable to take over Yuji’s body, and basically, Yuji takes the initiative.


Besides, when Yuji eats a lot of Sukuna’s fingers at once, for example, he temporarily loses his consciousness and Sukuna comes out for a while.

Also, even if Yuji takes in all 20 of Sukuna’s fingers, it is still unknown whether he will be able to take control of his body.

If the interests of Sukuna and Yuji coincide, they can take turns without Binding vow.

In chapter 2 of volume 1 of the manga, when Satoru Gojo recklessly asked him to “try to replace Sukuna for just 10 seconds”, Yuji took over for exactly 10 seconds.

However, the only time he can take over so freely is when the interests of Yuji and Sukuna coincide.

The interest or binding vow between curses and humans is a very important element in the Jujutsu Kaisen.

And if, for example, this binding vow is broken unilaterally, a terrible penalty will be imposed.

When they change without Binding vow, Sukuna takes the initiative.

Sukuna is usually inside of Yuji Itadori, but comes out when Yuji wants to replace him, or when he takes in a lot of Sukuna’s fingers at once.

In manga volume 1, chapter 2, there was a unity of interest, Yuji wants to replace Sukuna, and Sukuna wants to come out, so he was able to do so quickly.

But in the manga volume 1, chapter 7, when Yuji took over from Sukuna, he did so unilaterally, and without any binding vow with Sukuna, he lost the control of his body for a while.

Sukuna’s one finger alone is too strong, so for Sukuna to be able to free Yuji’s body without any binding vow is a threat to the human world.


[Jujutsu-Kaisen] The enchain and binding vow between Sukuna and Yuji

Although it was an outrageous turn of events that the main character of the story died very early on, he was not completely dead, as there was Sukuna nesting inside Yuji.

After Yuji was thought to be dead, there was a scene of a fight between the two of them in the innate realm of Sukuna, where the story of the contract I mentioned at the beginning comes out.

Now let’s look at this contract scene in detail.

The condition of Tsuina’s coming back to life in her innate realm and her proposed contract

In chapter 11 of the 2nd volume of the manga (the 5th episode of the anime), there is a scene in the innate realm, where there are bones of creatures all around, and the ceiling is covered with huge spines and ribs.

As soon as he sees Sukuna’s face, he throws animal skulls that were lying around, and tries to hit him, but in the end he is twisted down by Sukuna.

At this point, Sukuna reveals to us that he is not completely dead yet, and further proposes that ‘if you accept our conditions, we will bring you back to life’.

This is the scene where he proposed the contract and binding vow.

Let’s look at the conditions of the contract one by one.

What is conditions of their contract?

The conditions of the contract between Sukuna and Yuji is as follows.

  • When Sukuna would chant “Enchain”, Yuji has to let Sukuna take control over his body for a minute.
  • Yuji will forget about this agreement.
  • Sukuna won’t kill or hurt anyone.

Third one is the order from Yuji though, first and second condition are completely mystery.

Why is the duration of “Enchain” just one minute?
Why does Yuji have to forget this agreement?

We should focus on those condition from now on.

[Jujutsu-Kaisen] Explanation of the Binding vow beween Sukuna and Yuji and non-existent memory

Although it seems that Sukuna’s technique has not been scarred on Yuji’s body yet, there is a scene in the story where it is rumoured to be his own unique technique, unrelated to Sukuna’s one.

The technique of Yuji has not been told in detail in this story, but we will look back at the scenes in the chronological order of the story.

Non-Existent Memory: Becoming classmates with Junpei Yoshino

The door picture of chapter 27 of volume 4 of the manga shows Jumpei Yoshino alongside Yuji Itadori, Megumi Fushiguro and Nobara Kugisaki.

At the end of chapter 26, Yuji invites Jumpei to “come to the majic technical college”, so this door picture looks like the author just drew it hypothetically.

However, looking at the phenomenon after Aoi Todo, this picture of Jumpei Yoshino seems to be looking at the “non-existent memory” that “Jumpei Yoshino is with Yuji and others”.

Non-Existent Memory: Becoming classmates with Aoi Todo

Non-Existent Memory: Becoming classmates with Aoi Todo(C)Gege Akutami/Shueisha

In chapter 35 of the volume 5 of the manga, Aoi Todo’s cliché “What type of girl do you like?”.

Then Yuji replied, “A tall girl with a big butt”.

Aoi’s taste in women was exactly the same as his, and it was the answer he was looking for the most.

In the next moment, Aoi Todo’s brain was filled with the “non-existent memory” that she had spent the same junior high school life with Yuji.

After this, Aoi Todo likes Yuji so much that he calls him “my friend”, “my best friend” and so on.


It could be said that this scene is just as “Aoi Todo is a weird guy”.

In fact, the description of Aoi Todo in this scene is becoming more and more “he’s just a weird guy” lol.

Non-Existent Memory: Is Yuko Ozawa’s memory real?

In chapter 64 of volume 8 of the manga, there is a scene where Yuko Ozawa, who is from the same junior high school as Yuji Itadori, has tea with Nobara Kugisaki.

Yuko Ozawa had been interested in Yuji since junior high school, but she felt guilty because she was overweight, so they only took a picture together at graduation.

However, when she happened to see Yuji with Nobara on the street, she first approached Nobara.


Non-Existent Memory: Is Yuko Ozawa's memory real?(C)Gege Akutami/Shueisha

Afterwards, Nobara calls up Yuji (very forcibly).

She recognizes at a glance Yuko Ozawa, who is so different in shape from her junior high school days, and at that moment memories of her junior high school days flow through Yuko Ozawa’s brain.

In her memory, Yuji was asked “Who do you like among the girls in your class?” In her memory.

And Yuji replied, “If I had to say, I would say Ozawa“.

It is possible that this memory is the real memory of Yuko Ozawa, but seeing the phenomenon of Aoi Todo, it seems that “this is also a memory that does not exist?” I think it is.

Non-Existent Memory: Yuji becomes Choso’s younger brother

In chapter 106 of the volume 12 of the manga, another strange phenomenon occurred at the climax of the battle between Yuji and Choso.

The existence of an unidentified technique on Yuji is depicted as decisive in this battle against Choso.

At the moment when he is about to attack yuji, a “non-existent memory” of the four brothers, Choso, Eso, Kechizu and Yuji, flows in his brain.

He suddenly went crazy and left the front line of the Shibuya Incident.

What is the trigger of the non-existent memory? Common points in triggering conditions

There is a common denominator before the phenomenon of creating the “non-existent memory” of Yuji Itadori, which we have talked about so far.

With a few exceptions, it is thought that “person’s mind was shaken” is the trigger. This may be the binding condition for the triggering.


As for the scene with Junpei Yoshino, just before the door picture where he is classmates with Yuji and his friends, Yuji invites him to join the majic technical college.

Junpei Yoshino had been bullied at school and had never gone to school because he didn’t have any friends, but he was happy that Yuji became his first friend and invited him to be a part of the group.


And in the case of Aoi Todo, when Yuji was asked about his favourite type of girl, he answered “a tall girl with a big butt”, which was the answer that Aoi Todo wanted the most, and the “non-existent memory” occurred.

This is the answer that Aoi Todo wanted the most, and it seems to have shaken his heart.


In the case of Yuko Ozawa, when Nobara called on Yuji, she thought that

  • Yuko Ozawa’s appearance had changed too much.
  • Yuji might not recognize her and say, “Who is she?”.
  • That’s the last thing you want to hear from the man you love, isn’t it?

She was worried. But Yuji recognised Yuko Ozawa at first sight and said “Hey Ozawa. What’s up?”.

It’s not clear whether the memories of junior high school that followed are “memories that don’t exist” or not, but at the very least, Yuji’s words must have shaken Yuko Ozawa to the core.

If this is a “non-existent memory”, I pity Yuko Ozawa too much…


In the case of Choso, the trigger is ambiguous. The reason is that he didn’t talk to Yuji just before he touched the “non-existent memory”.

Bisides, he asked Yuji about the end of his brothers before the battle.

It wasn’t the answer he wanted, but his face was distorted when he heard that his brothers were crying at the end of their lives, which suggests that he was very upset.

(Update) ‘Non-Existent Memory’ is not Yuji’s technique!

The author, Gege Akutami, who appeared on TV program, mentioned about the “non-existent memory” that happened around Yuji.

According to Mr. Akutami, this phenomenon is not the result of Yuji’s technique, and the “non-existent memory” seen by Aoi Todo and the “non-existent memory” seen by Choso are completely different factors.

The relationship between Choso and Yuji is like a half-brother relationship, because they were both created by the same person(i.e. Kenjaku).

On the other hand, the “non-existent memory” that Aoi Todo saw was completely due to Aoi Todo’s eccentricities, and in any case, it was not due to any of Yuji’s technique.

Conclusion of “[Jujutsu-Kaisen] Sukuna and Yuji have binding vow?What’s “Enchain”?”

In this article, I have explained about the relationship between Sukuna and Yuji, the binding vow, and the techniques of Yuji in Jujutsu Kaisen.

The relationship between Sukuna and Yuji is the beginning of the story of Jujutsu-kaisen, but as the story progresses, the binding vow they have made, and the mystery of Yuji himself, are getting more and more involved.

We’ll have to keep an eye on the development of the true nature of the binding vow between Sukuna and Yuji.

Other articles related to Jujutsu Kaisen are also available here

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