Kaio Yo is a skilled fighter with Kaio rank. Yo claims to primarily practice Kongoken, a form of strength and endurance training used in many martial arts. According to Yoh himself, he claims to have a "diamond" body, which he trained to withstand strikes from wooden swords, chains, being run over by a heavy loaded truck and being shot by an old fashion cannon ball. His strongest feat is staying conscious after standing under a waterfall in the midst of a typhoon.