Eiichirou's mother has a strong personality and has her say in all the family matters. She is proud of her son and wants to help him. She suggested to Eiichirou to go to STC, when he claimed he needed some exercise. But she was against him taking it too seriously and was angry when he told her that he wants to become a professional tennis player. Later on she agrees on a condition that if he loses at All Japan tournament, he will quit.