User blog comment:Xilinoc/Ch. 576 - THE KILLERS HIGH 2/@comment-24331706-20140409173910

I think that Kubo went too far about the Grammys power. Power of imagination is absolute power. No power in manga/anime universe is equal to that power. In other terms, Kubo made him a little God. TK should have choosen a different power for him that is not so OP. That is only thing that I m little dissapointed. Anyway I m very happy cause this chapter revealed a name of Kenpachi's zanpakuto. As I could find on Google, name Nozarashi is related to skeleton, bones. If you have noticed when Kenpachi removes his eyepatch in battle his spiritual pressure get a shape of a skull. So taking all this into consideration, we could expect his shikai is probably related to skeleton/bones.