A 42-year-old wife of Yoshikaze Masatsugu, a former sumo wrestler, was arrested on suspicion of assault for beating the eldest daughter in fifth grade.
The Metropolitan Police Department is investigating that the eldest daughter was suspected of being abused.
The person arrested was Ai Onishi (42), the wife of former Yoshikaze Masatsugu Nakamura.
According to investigators, there is a suspicion of assault in June last year when he hit or kicked the body of his eldest daughter, who was 11 years old in the fifth grade of elementary school, in a room in his apartment in Setagaya-ku, Tokyo.
The eldest daughter took a picture of the situation at that time with a smartphone and consulted with her father, Nakamura.
The footage also showed the suspect rubbing an insect bite remedy into his eldest daughter's eyes on the same day.
The Metropolitan Police Department is investigating the details of the suspected eldest daughter's previous abuse.