User blog comment:Neowitch/710 - Caesar for next Straw Hat!/@comment-4374114-20130605230731/@comment-195.241.127.96-20130606182012

Zoro cut Daz Bones with haki. Yep that was haki (whether he knew about it or not). That special swordsmen thing is haki. Haki = (willpower) Strenght. Everyone who has a strong willpower, or is just strong (not sure) is able to use busoshoku haki.