On June 1, 2004, an 11-year-old schoolgirl, later dubbed "Girl A", murdered her 12-year-old classmate, Satomi Mitarai, in an empty classroom during the lunch hour at Okubo Elementary School in Sasebo, Nagasaki Prefecture.[8] Girl A then left Mitarai's body and returned to her own classroom, her clothes covered in blood.[9] The girls' teacher, who had noticed that both girls were missing, stumbled upon the body and called the police.[10]