|First Appearance||Chapter 47|
Satō's Uncle was Satō's mother's brother and a Chinese mafia boss.
He was an older chinese man with black hair and a small ponytail. He has a stubble beard.
He met Satō when he was just a child however his mother didn't want Satō to meet his uncle as due to his line of work. He contacted Satō asking him to help train recruits in Japan. He was later killed by some rivals.