A 15-year-old junior high school girl killed herself last week after leaving a note accusing a male coach at her table tennis club of verbal abuse, a local education board said Monday.

In the note left at her home, the site of her death on April 30, she wrote that the coach, who is also a teacher at her school, had called students "idiots" and told them, "I will kill you." He also made physical contact with several club members, according to the board of education in the city of Takahagi, Ibaraki Prefecture.

The teacher is a veteran table tennis coach and the club has a track record of sending players to compete in national tournaments. He largely admitted to the girl's allegations, saying, "the coaching had gone too far," the board said.