Kinjite (禁じ手 or 禁手, literally forbidden hand) are various fouls that a sumo wrestler might commit that will cause him to lose the bout.
They are:[1] Any of these is grounds for immediate disqualification (hansoku) owing to the potential for long-lasting harm to the wrestler involved.
Since it is tied up in a form of chonmage one's hand can become inadvertently tangled in it during a bout.
Itai pulled his opponent's hair on two consecutive days when ranked in the jūryō division in May 1980.
In addition, there are moves that are permitted to professional rikishi and forbidden to more junior (school level) wrestlers.