The concept of Reverse Cursed Techniques was introduced quite a while ago in Jujutsu Kaisen. It is an incredibly complex and overpowered ability that only a handful of people can harness. Reverse Cursed Techniques allow the user to take all the negative cursed energy within themselves and somehow turn it into positive energy instead, hence the name "Reverse Cursed Techniques."
These techniques are primarily used to heal human bodies, however, they can also fulfill other roles in some cases. Reverse Cursed Techniques have only been used by a select few individuals in the world of Jujutsu Kaisen and the degree to which they can perform it varies from person to person.
8 Shoko Ieiri
Shoko is one of the prized possessions of Jujutsu High as she serves the role of the doctor. She is an incredibly good user of Reverse Cursed Techniques and she primarily utilizes this power to heal others. Being the doctor, she has great responsibility on her shoulders and, to perfect this art, she has put in years of effort, resulting in her being held in incredibly high regard at Jujutsu High.
Shoko has a great grasp of this skill, however, she isn't all that good and explaining how Reverse Cursed Techniques work.
7 Uraume
Uraume is also a user of Reverse Cursed Techniques. When they were shot right through the hand by Choso, they immediately made use of Reverse Cursed Techniques to heal from this damage and fill up the hole completely as if it never existed.
However, they were not able to get rid of the poison that had already started flowing through their body. This is because poisoning is an effective way to counter the Reverse Cursed Technique users. Nonetheless, just the fact that they were capable of using Reverse Cursed Techniques is proof enough that they are incredibly powerful.
6 Iori Hanezuki
Iori Hanezuki's powers work in a very interesting manner. They primarily rely on their cursed energy to detonate themselves and use some of their body parts as projectiles that can explode, such as the teeth and the eyeballs.
Iori can utilize Reverse Cursed Techniques to replenish their flesh, especially the parts of their body that they send flying.
5 Kinji Hakari
While Hakari is not a user of Reverse Curse Techniques, his Domain Expansion, called Idle Death Gamble, allows him to use infinite Cursed Energy for 4 minutes and 11 seconds. If he hits the jackpot, he then gains the ability to reverse any damage that his body sustains.
And this reversal of Cursed Techniques is so powerful that his body actually starts to heal while it is taking damage, which is nothing short of staggering. Anything from a blown arm or even toxins within his body are things that he can heal from.
4 Kenjaku
Kenjaku was an extremely skilled user of Reverse Cursed Techniques. After he found Geto's body and implanted his brain within, he used Reverse Cursed Techniques to heal all the damage that he had taken.
All the scars that resulted from the surgery were also subsequently healed by his Reverse Cursed Techniques. He can also utilize positive energy in other ways such as magnifying the effects of gravity around himself, which is a diabolical ability.
3 Yuta Okkotsu
Yuta Okkotsu is an extremely skilled Jujutsu Sorcerer and for someone as skilled as him, utilizing Reverse Cursed Techniques is not much of a challenge, even though the complexities of this technique prevent most users from ever mastering it.
When Suguru Geto attacked Panda, Maki, and Toge, it was Yuta who ended up using Reverse Cursed Techniques to heal them. Much of this was down to the influence of Rika, who possessed insurmountable amounts of Cursed Energy. However, even after Rika left, Yuta retains the ability to use Reverse Cursed Techniques to great effect.
2 Ryomen Sukuna
Ryomen Sukuna is the strongest curse to ever exist in the world of Jujutsu Kaisen so it is not a surprise for the fans to know that he can utilize Reverse Cursed Techniques. Fans have seen Sukuna use these powers when he was within the body of Yuji Itadori. When Yuji was on the brink of death, he used his powers to bring him back to life after the two agreed to a Binding Vow.
Sukuna can use the power of Reverse Cursed Techniques to heal himself and others freely. Of course, the degree to which he can utilize this power depends on how strong he is at the moment.
1 Satoru Gojo
Unsurprisingly, Satoru Gojo, who is believed to be the current strongest Jujutsu Sorcerer, also knows how to use Reverse Cursed Techniques and he has utilized these powers on several occasions in the story already. That said, it was quite difficult for Satoru to get a grasp of this power. For the first two years he spent at Jujutsu High, Satoru was unable to grasp the concept and it took him quite a lot of time to finally wrap his head around how these powers work.
It was only during his fight against Toji Fushiguro that he was able to tap into the true power of Limitless and then heal himself from a near-death state. He then went on to use Limitless: Red and Hollow Technique: Purple, using which he ultimately defeated Toji. Due to Six Eyes preventing his Cursed Energy from ever truly running out, Satoru can technically keep replenishing his Cursed Energy using Reverse Cursed Techniques and he has already done so on several occasions during his fight against Sukuna. He can also heal at a near instantaneous rate, even from a Domain as powerful as Malevolent Shrine.