He once idolized a yakuza and eventually became one himself.
It was revealed in The King of Fighters '97 that Yamazaki is one of the Orochi Hakkesshu. Even though an Orochi Hakkesshu member's duty is to resurrect Orochi, Yamazaki shows little to no interest in doing so. He just wants to live his life as a criminal.
He fights using dirty brawling tactics, such as kicking sand into an opponent's eye, and his always present knife. He can also stretch his left arm like a snake for extra range and turn his right arm into a drill (but this drill can only be seen in one of his (Super) Desperation Moves).
