Busoshoku: Bogyo

Busoshoku: Bogyo (武装色 防御, Busō-shoku: Bōgyo; literally "Color of Armaments: Defense") is the method of both imbuing one's self in an outer layer of while also internalizing the armament Haki, producing a significantly greater defense than standard reinforcement Haki. Within the Haki Development System, it is classified as a Fifth Dan level technique.

Overview
It has been also referred to as an "Armored Defense". The idea of covering one's body in Haki was originally meant to serve as a means to combat individuals with Devil Fruit abilities. It is for this reason that the most basic level of the armament Haki is for it to serve simply as an outer layer armor to force the target's body to "take form". However, imbuing the body also provides a considerable defense that also supplements one's physical attacks, even allowing them to be used in tandem with a Devil Fruit ability. But even in such a situation, it must be remembered that at this stage, the armament is simply taking the form of literal armor. No matter how strong the armor, the limb inside of that armor is still vulnerable.

Upon learning to internalize Haki, the user can not only armor their outer body but also strengthen the body from within as well, producing a far more sturdy defense. When two attacks, one with standard armament and one with the internalized armament, of both equal levels of Haki, clash, the one with standard armament will always be defeated and its user may even find themselves in severe pain as a result.