Wasuke and Sukuna (Shueisha/Jujutsu Kaisen)
As we know, many people thought that Sukuna was Jin’s twin, Yuji’s father, because of the curse king’s statement in chapter 257. However, in volume 29, there is confirmation that Wasuke, Yuji’s grandfather, is actually the curse king’s twin. This certainly changes the dynamics of the cursed family relationships between the main protagonists and antagonists of Jujutsu Kaisen.
Is this fact really true? Here’s the situation!
Many people initially thought that Jin was the reincarnation of Sukuna’s twin

When chapter 257 was released, Ryomen Sukuna theorized about the reason why he and Yuji felt an unusual connection. He suspected that it was all Kenjaku’s doing, who had likely found the soul of his twin and made him reincarnate. In Sukuna’s mind, Kenjaku deliberately became the partner of his twin’s reincarnation in order to create a vessel strong enough to contain the soul of the Curse King. From this statement, many readers immediately thought of Jin because Sukuna mentioned him specifically. However, what is often forgotten is that this statement is still only a hypothesis.
Sukuna is only speculating based on the situation he understands, not revealing any confirmed facts.
This was confirmed by Gege himself in volume 29 of the Jujutsu Kaisen manga.

Sukuna’s statement was then “refuted” by Gege Akutami through additional notes in volume 29. In the bonus illustrations, Gege released sketches of Wasuke and Sukuna’s faces in one frame. If you look closely, Wasuke’s features do look familiar to Sukuna, especially his strong jawline and hairstyle. It’s not just about their faces; Wasuke also shares another similarity with the Curse King, namely their basic martial arts skills. Although his level is clearly far below Ryomen Sukuna’s, Wasuke is known as the one who taught Yuji the basic fighting techniques. That is what made Yuji Itadori so physically tough even when he was still in junior high school.
Upon closer inspection, Wasuke’s characteristics appear more like the opposite of Sukuna rather than Jin.

One of the characteristics of twins is not only their facial resemblance, but also their contrasting personalities. Jin’s personality remains a mystery. He is only briefly shown as a loving father who is happy to welcome the birth of his son. In contrast, Wasuke shows many sides that are in stark contrast to Ryomen Sukuna. Wasuke is described as a gentle and caring man, unlike Sukuna, who tends to be very cold and selfish. It was the grandfather who instilled in Yuji Itadori the principle of always helping others. This value became a strong foundation in Yuji’s personality.
Don’t forget that Wasuke is also easily provoked and very stubborn, to the point that he once scolded Yuji for visiting him too often and bringing him flowers every day. This is in stark contrast to Sukuna, who is still calm and flexible, such as working with Kenjaku for more profit.
The timing of Wasuke’s death and Sukuna’s resurrection seems to be a metaphor that the same soul cannot exist at the same time

In addition to their contrasting personalities, the timing of Wasuke’s death, which occurred close to the moment of Ryomen Sukuna’s resurrection, feels like a symbolism deliberately planted in the story. Wasuke breathed his last breath just before Yuji was completely dragged into the cursed world. Shortly after that, an incident involving Yuji finally occurred where he was forced to swallow the cursed finger, causing Sukuna to awaken and begin to take an active role in the young man’s body.
Narratively, these two events seem to give the impression that the two souls, who are connected by fate, cannot truly exist at the same time.
If interpreted further, Wasuke’s death can be seen as the end of one side, marking the emergence of the other, opposite side. It is as if, when one light goes out, the shadow that has been waiting finally takes over the stage. Whether this is a coincidence or subtle foreshadowing from the creator, the moment feels too precise to ignore. It seems to function not only as a plot transition, but also as a metaphor that one side of existence must step aside so that the other side can fully rise. The depiction that Yuji’s beautiful times with his relatives must end, replaced by the darkness of tragedy brought by the cursed king that dwells within him.
That is the explanation of Wasuke, who turns out to be Sukuna’s twin.
What do you think?