In Jujutsu Kaisen, Domain Expansion guarantees a guaranteed hit effect, amplifying the user's innate technique to its absolute limit. Thus, given Nanami's precise and efficient fighting style, her Domain Expansion would likely have transformed her already lethal technique into something truly terrifying! Therefore, looking at the mechanics of her cursed technique and how Domain Expansions work, it's possible to imagine just how deadly Nanami's expansion could have been.
Jujutsu Kaisen: Nanami's 7:3 Ratio and its Potential for Expanding Mastery

Nanami's cursed technique revolves around identifying a target's weak points and dividing them in a 7:3 ratio. This allows him to deliver critical attacks with increased force. This ability is already formidable, allowing him to cut opponents with surgical precision. Furthermore, with a Domain Expansion, this technique can be amplified to an extreme degree.
If Nanami's Domain guaranteed a guaranteed hit, it could mean that every part of her opponent's body would be forcibly divided in a 7:3 ratio . That is, it would eliminate the need for her to manually identify weak points, as the Domain itself would perform the divisions. Her opponents wouldn't be vulnerable in just one spot; they would be segmented across their entire form! Making each strike achieve maximum lethality. This level of precision would make her Domain not only powerful but virtually unavoidable, since even cursed defensive techniques could fail to withstand the sheer volume of precise attacks.
The devastating power of repeated 7:3 attacks

One of the most intriguing aspects of a Domain Expansion is the potential to apply the user's technique at an accelerated rate. So, in Nanami's case, this could mean that her 7:3 splits happen continuously and automatically, bombarding her opponents with numerous critical hits before they even have a chance to react.
Imagine an enemy being struck not just once or twice, but thousands of times per second, each blow landing directly on a newly formed weak point . The brute force of repeated cursed energy attacks would be catastrophic, leaving even the strongest opponents defenseless. Unlike Gojo's Void, which overwhelms the mind with endless information, Nanami's Domain would be a relentless assault of physical destruction, making it one of the most effective offensive Domains imaginable.
Why Nanami's expanded domain would rival the strongest in Jujutsu Kaisen

The best domains in Jujutsu Kaisen, such as Gojo's Infinite Void and Sukuna's Malevolent Sanctuary , completely reshape the battlefield in favor of their user. Conversely, Nanami's Domain would achieve a similar effect, granting her an overwhelming advantage through sheer precision and damage output. Unlike Gojo's infinite knowledge overload or Sukuna's vast area-of-effect attack, Nanami's Domain would focus on relentless and precise strikes, ensuring that every attack was lethal.
Although Nanami never achieved a Domain Expansion, the potential for one was always there. Had he managed to unlock this ability, he would have wielded one of the most terrifying and effective techniques in Jujutsu Kaisen , standing alongside the most powerful sorcerers in the series. His methodical approach to combat, combined with an amplified version of his 7:3 Ratio, could have created an unstoppable force that few, if any, could hope to contain.
So guys, what's your opinion on this theory? If Nanami had time to develop an Expansion, would he be one of the strongest? Leave your opinion below and see you next time.
