Yuta's Okkotsu Technique is Copy, in chapter 250 of the Jujustu Kaisen manga, it was made known to us all that his domain ( All Encompassing Unequivocal Love ) allows him to choose any one of his copied Techniques to Imbue the Barrier with a domain sure hit effect, as for the remaining copied Techniques they're scattered randomly among Katana's seen in his domain, and only Yuta Okkotsu can utilize the copied Techniques scattered among the Katana's in his domain, however, he doesn't know which Katana contains which Technique Until he grasps it for the first time
There are numerous Katana in his domain, which signifies that Yuta Okkotsu has a lot of copied Techniques, However, each copied Technique imbued amongst the Katana can only be made use of once
The battle continued, and Sukuna was cornered by Yuta Okkotsu and Itadori Yuji, immediately Rika ( Cursed Rika/ Yuta's Shikigami ) attacked Sukuna, Sukuna tried counterattacking Rika's attacks, however, he immediately noticed Yuta applied an inviolable Barrier Techniques to his Shikigami's Path, this made it somewhat impossible for him to counterattack Rika neither put a dent on her
Sukuna finally admitted that after his battle with Satoru Gojo his reverse curse technique has been sluggish and he has been unable to expand his Domain, with the way things seem, his (Sukuna) Current Curse energy Output is definitely on the level of Yuta's, also he said making use of Hollow Wicker Basket rendered him unable to make use of his World Bisecting Dismantle, in short, he was unable to go on a domain clash, and also unable to make use of the technique he used to Defeat Satoru Gojo
The battle continued further, apparently, it was a 3 v 1 situation, Yuta Okkotsu, Rika and Itadori Yuji all working together to accomplish their desired goal, which is the death/Defeat of Sukuna. Itadori Yuji seems to be doing more damage to Sukuna than he least expected, apparently, Itadori can see the barrier between Sukuna's soul and Megumi's, and he is trying Rouse Fushiguro Megumi Soul that's has been Submerged by the bath, thereby making it quite difficult for him to control Megumi's body freely, to make matters worse because Itadori Yuji is aiming for the barrier between their souls (Sukuna and Megumi's Soul), anytime he takes an attack from him, his Curse energy Output Falls, and his control of Megumi's body weaken.
Yuta Okkotsu and Itadori Yuji kept attacking relentlessly until Sukuna seemed to be unable to maintain Hollow Wicker Basket, this definitely reveals they plan to make use of Angel's ladder Technique against him to free Megumi's soul, immediately Yuta attacked Sukuna with thin ice breaker, Rika also responded with her own attacked dished out to Sukuna, nevertheless, Sukuna attacked them both including Yuji with his Cleave attacks, followed by simultaneous attacks, nevertheless, he noticed if he doesn't make a direct contact he won't be able to leave a fatal Damage on them, nonetheless he noticed all the Jujustu high sorcerers he's been fighting for a while now all have extremely tight defense, so it's going to be a hassle to get his desire objective
Both Yuta Okkotsu and Itadori Yuji admitted to the fact that they're still standing and fighting on because of the enormous damage done to Sukuna by Satoru Gojo and that if not for that they would have been dead any second, probably from Sukuna's World Diamante Technique
The battle continued, whereas Sukuna analyzed all the insanely powerful techniques at the disposal of Yuta's Okkotsu, and pointed out those he would be unable to use eg Gojo's limitless, Sukuna believed he would be unable to utilize that technique without the Six Eyes, and his perception was right
On Yuta's end, he believed Sukuna would definitely be caught off guard by a Technique he hadn't seen being used, or a Technique he didn't believe any could make use of, Without any delay Yuta picked up a Katana and immediately attacked Sukuna, Sukuna grab the Katana easily however the Technique Imbued in that Katana was Sukuna's Cleave attacks, turns out he was really caught off guard by his own attack, and fatal damage was done to him(Sukuna)!!
