>>282028197
>you're supposed to find out Yoriichi and Kokushibo are different characters by reading it being carefully revealed in the Kokushibo fight
You don't even need to wait that long if you've picked up of gotouge's continued use of character design.
We're introduced to Koku with his 6 eyes, then a few chapters later, we meet a robot built after a "great swordsman" that the robot needs 6 arms to replicate the movements of.
6 Eyes. 6 Arms.
It's obvious from reading no further in the manga than this page, that the 6 Eyes man specifically became a demon out of envy from his inability to follow the movements of the "6 armed" man.
Not only are they different people, but 6 eyes definitely knew 6 arms before 6 eyes chose to become a demon.
Now, if Koku was introduced with as a demon with 6 arms (or more), then you could conclude that they were the same person, but him instead having 6 eyes avoids that.