Battleship bags is strength training nothing else.
Stop with the baseless headcanons. There was no haki involved with that training
Stop with the baseless headcanons. There was no haki involved with that training
It's all about willpower(so haki) to hit something so hard (that it breakes bones) many times over and over,ripping you skin,constant bleeding etc and doing that daily..
It is basically there to steel yourself and your will. Haki training .