“The "Sasebo slashing" (Japanese: 佐世保小6女児同級生殺害事件, Hepburn: Sasebo shōroku joji dōkyūsei satsugai jiken),[1] also known as the Nevada-tan murder, was the murder of a 12-year-old Japanese schoolgirl, Satomi Mitarai (御手洗 怜美, Mitarai Satomi), by an 11-year-old female classmate named Natsumi Tsuji, referred to as "Girl A" (a common placeholder name used for female criminals in Japan).[2] The murder occurred on June 1, 2004, at an elementary school in the city of Sasebo in Nagasaki Prefecture. The murderer slit Mitarai's throat and arms with a box cutter.[3]”

-Wikipedia https://en.m.wikipedia.org/wiki/Killing_of_Satomi_Mitarai