성별 : 생일 : 키/몸무게 :
Sensei A former pro-wrestler, he is the boss of the gangsters Miu defeated in the first chapter of the manga. He first makes an appearance when his men try to attack Kenichi and Akisame when they were searching for Miu, his fight is used by Akisame to show Kenichi how jujitsu fighter battle larger opponents. He appears later at a race track where Sakaki takes him out in one punch. He is probably a decent fighter but no where near the strength of the masters of Ryōzanpaku. His name is unmentioned, but his men call him sensei.
He calls Sakaki "Leather Jacket" and Akisame "Grim Reaper with a Mustache" and considers them monsters.