Kazuo Akuji is the founder and head of The Ronin. He is apparently world renowned for his skills not only as a successful businessman, but as a ruthless leader. He is an old enemy of Mr. Wong, who are considered as mortal enemies. Kazuo is disappointed in his son, Shogo, referring to him as an idiot and annoyed at his constant failures. Kazuo is a ruthless man, and has excellent swordsmanship.