The sole child between Hanma Yujiro and Akezawa Emi, Baki was put through rigorous training by his father Yujiro since his youth in order to make him "The Strongest Creature on Earth". When Baki was 13, he was soundly defeated by Yujiro in a "graduation" fight that resulted in his mother's death. Baki has since sworn to surpass his monstrous father, both to earn his respect and to avenge his mother.
To that end, Baki started entering the underground fighting circuit with free-for-all rules, using these experiences to hone himself in hope of defeating Yujiro.
