As we know, Kokuto are blades that turned permanently into black ones. Zoro said one of the main features of a Kokuto is its extreme hardness, making it impossible to break it "even if a dinosaur stepped on it".
Obviously that's remniscent of Koka, which consists of blackening body parts/things to increase their hardness. Then there's the level beyond that, Koka being the basic level of CoA.
If Kokuto blades are reminiscent of Koka which is just the first step of CoA, then maybe there's a more advanced, ultimate grade reminiscent of the advanced form of CoA. Now don't get me wrong, I'm not saying turning blades into Kokuto only requires basic CoA without the need to master advanced CoA, this is most likely not true. But if there's more than one form of CoA then there might be more than one "state" since Kokuto state itself seems to be ultimately tied to CoA and the strength of its user.
What would be the point of it ? Well, it's very simple. Kokuto achievement is something that's not new, something achieved not only by the current WSS but also by the Sword God himself, Ryuma. Part of Ryuma's legend has a lot to do with him being able to turn Shusui into a Kokuto.
Zoro wants to become such a great swordsman that "his name will be known in heaven".
It feels to me like he wants to set a new milestone. The problem is, if the "only" thing Zoro can do is turn his blades into Kokuto, this won't be such a spectacular feat because in a way, he would stay in Mihawk and Ryuma's shadow. I mean yes, he can prove he's stronger than Mhawk by beating him but how is he supposed to prove his superiority to the Sword God who died a long time ago ? Well, the best way to do it and set a new milestone is to achieve a swordsman feat that can objectively be regarded by anybody as the clear proof of Zoro being the GSOAT. Which could translate into Zoro turning permanently a Kokuto into a state even more advanced than Kokuto. It could be called "Shinto" ("divine blade"), a name very fitting for someone like Zoro.
Obviously that's remniscent of Koka, which consists of blackening body parts/things to increase their hardness. Then there's the level beyond that, Koka being the basic level of CoA.
If Kokuto blades are reminiscent of Koka which is just the first step of CoA, then maybe there's a more advanced, ultimate grade reminiscent of the advanced form of CoA. Now don't get me wrong, I'm not saying turning blades into Kokuto only requires basic CoA without the need to master advanced CoA, this is most likely not true. But if there's more than one form of CoA then there might be more than one "state" since Kokuto state itself seems to be ultimately tied to CoA and the strength of its user.
What would be the point of it ? Well, it's very simple. Kokuto achievement is something that's not new, something achieved not only by the current WSS but also by the Sword God himself, Ryuma. Part of Ryuma's legend has a lot to do with him being able to turn Shusui into a Kokuto.
Zoro wants to become such a great swordsman that "his name will be known in heaven".
It feels to me like he wants to set a new milestone. The problem is, if the "only" thing Zoro can do is turn his blades into Kokuto, this won't be such a spectacular feat because in a way, he would stay in Mihawk and Ryuma's shadow. I mean yes, he can prove he's stronger than Mhawk by beating him but how is he supposed to prove his superiority to the Sword God who died a long time ago ? Well, the best way to do it and set a new milestone is to achieve a swordsman feat that can objectively be regarded by anybody as the clear proof of Zoro being the GSOAT. Which could translate into Zoro turning permanently a Kokuto into a state even more advanced than Kokuto. It could be called "Shinto" ("divine blade"), a name very fitting for someone like Zoro.
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