Webyoriichi was a human with extraordinary swordmanship and had the most powerful breathing style that could even take down muzan, while kokushibo was originally a. Webkokushibo was an extraordinary and powerful swordsman, proven to be the strongest of the twelve kizuki and the second strongest demon in the series, just behind muzan. Webthe demon king revealed the death of gyutaro, berating kokushibo and his fellow upper ranks for their weakening demon strength and citing their failures as being unable to. His abilities have been refined to his highest potential with his total mastery. Webkokushibo’s unique flesh katana isn't just for show. Here's what makes it stand out from other weapons in demon slayer. Webkokushibo is actually not the character’s real name, which is tsugikuni michikatsu. Kokushibo means black death, a name befitting of the character that. Webdespite all his actions, misdeeds, and crimes he had committed, kokushibo was a shattered man who couldn't handle the weight of such unfathomable burdens. At the time of his. Webkokushibo is one of the major antagonists of demon slayer. Before he became a demon, he was actually a human named michikatsu tsugikuni, who. Webkokushibo in demon slayer explained.