Jujutsu Kaisen: What Is Sukuna’s Black Box Ability?

Jujutsu Kaisen: What Is Sukuna’s Black Box Ability?

Alongside Kenjaku, Sukuna is the big baddie in Jujutsu Kaisen. That is a fact that basically everyone who is following the series knows. Sukuna is a cursed spirit and is said to be the King of Curses, which speaks enough about his powers and abilities. But, despite that, there are still many mysteries surrounding his character, and in this article, we will try to answer one of them. Namely, in this article, we will discuss Sukuna’s unnamed Innate Technique, which fans have tentatively dubbed “Black Box.”

The so-called “Black Box” ability is supposedly Sukuna’s Innate Technique, but seeing how the focus was on Sukuna’s other abilities, this one never really had its chance to shine in the spotlight. Namely, “Black Box” seems to be a manifestation of Sukuna’s Innate Technique and is commanded (released) when Sukuna says, “Open!”. After using the command, he could use a fire-based attack on Jogo, but no further details have been provided about this technique. He has also been seen using invisible slashes to attack his opponents, but it is not known how this technique relates to his Innate Technique or the “Black Box” technique.

The rest of this article will focus on Sukuna and his powers and abilities. Sukuna is an incredibly powerful and dangerous character, as series fans will know, so it makes a lot of sense that people want to know about his abilities. The “Black Box” ability is a mystery, but we will do our best to provide you with a proper theory on which you can base your additional conclusions. Of course, this article will contain some spoilers, so we just wanted to warn you before we started.

Sukuna’s “Black Box”, as the fans have dubbed it, is probably a manifestation of his currently-unknown Innate Technique

The King of Curses. That is the nickname that the characters in Jujutsu Kaisen have given Sukuna, and he has certainly lived up to it so far, giving a hard time to a lot of characters, including Satoru Gojo, who is said to be the strongest character in the whole series.

His powers and abilities are truly amazing, and over the course of the series, he has proven himself capable of surpassing almost every obstacle that has appeared in front of him. But Sukuna is not invincible, and he can be outwitted and overpowered, as the fight with Gojo demonstrates. But this is a wholly different topic. What interests us here and now are Sukuna’s powers and abilities.


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Sukuna is an evil S-class cursed spirit and the most potent cursed spirit in history. Sukuna is a very strong and powerful being who is known as the irrefutable King of Curses. As he awoke, he was in Shibuya, where his adversaries were all but made worthless. Even Satoru knew Sukuna was powerful and that it would be difficult to defeat him, but he still believed he could.

Satoru is one of the few people who, as far as we know, can defeat Sukuna because of how few people, even among the S-classes, can equal his strength. Sukuna managed to develop into the most potent curse in the series when the series’ timeframe changed.

He is excellent in hand-to-hand combat, being one of the best in the whole series, and he is also skilled with weapons, although he does not use them that often. On top of that, he is one of the most intelligent characters in the series, which makes him particularly dangerous. But, what interests us here and now are his abilities related to cursed energy, i.e., jujutsu.

Sukuna is a curse of the S-Class with a huge amount of Cursed Energy. Despite continuously employing his skills over his multiple battles, he displayed no fatigue symptoms, making him almost impossible to defeat.

His mastery of the Reverse Cursed Technique and the Domain Expansion demonstrates his proficiency in managing cursed energy, as his Domain is one of the most powerful ones in the series, and it can even match Gojo’s in power. He is one of the typically strongest characters in this category and can even parry Gojo in many respects, as evidenced by their most recent encounter.

As you can see, Sukuna can do it all. He can do it all, whether it’s a fistfight, a swordfight, or a jujutsu fight. His Malevolent Shrine is one of the strongest and most dangerous Domains in the series, and he can also use the Reverse Cursed Technique, which gives him exceptional defensive abilities. This is why the other characters fear Sukuna and why no one wants to face him in a fight, save for Gojo, who was the only one confident enough from the very beginning that he could defeat him.

But, while Sukuna certainly has numerous techniques at his disposal, what interests us here, in this article, is a technique of his that has been dubbed the “Black Box” technique. This is not its official name but rather a descriptive title that has been given to the technique by the series’ fans, who have compared it to a black box, which makes sense.

This might turn out to be the correct name in the future if Akutami ever decides to name the technique, but knowing how Akutami can get a bit sloppy from time to time when the lore is concerned, we might never find out what this technique was.

We suspect that it has something to do with Sukuna’s Innate Technique, which has not been named. Now, whether it is Sukuna’s Innate Technique or whether it is just a manifestation of it is unknown at this moment, as this Black Box is often associated with the invisible slashes that he is capable of producing in the series.

The Black Box is activated by the command “Open!” and Sukuna then releases a strong fire-based attack on Jogo when the two of them fight. As we’ve said, we have too little to work with, so we don’t know if the Black Box simply copies other techniques or whether it is actually fire-based.


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It could be both. The “Black Box” could be Sukuna’s Innate Technique with which he can manifest and/or mimic numerous types of attacks that he keeps stored inside, but it could also be – simply – a manifestation of a much more dangerous Innate Technique that Akutami has yet to reveal in the series.

With the manga definitely moving towards its conclusion, we cannot guarantee that we are going to get a definitive answer to this, as Akutmai has thrown several unnamed techniques at us, but these are some of our thoughts on the matter, and we hope that Akutami will provide us with more information in the future.

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