Details of the brutal physical and verbal abuse an Osaka high school boy suffered at the hands of his basketball coach before committing suicide in December have been revealed in a report compiled by an external panel.

The 17-year-old captain of the Sakuranomiya Senior High School basketball team was struck multiple times in the face by coach Hajime Komura simply because "he failed to go toward a loose ball" and "allowed the opponent to steal the ball due to a lack of concentration" during games, said the report submitted Wednesday to the city of Osaka.

The panel examined the corporal punishment and verbal abuse that took place during two games the team played, on Dec. 18 and 22. The boy committed suicide Dec. 23.