is the name commonly used to describe the 11-year-old Japanese schoolgirl who was charged with murdering her classmate Satomi Mitarai. The murder occurred on June 1, 2004 at an elementary school in Sasebo, Nagasaki, and involved the slitting of Mitarai's throat and arms with a retractable knife. It has come to be known as the "Sasebo Slashing". The un-named killer has since become an Internet meme cartoon character. Wikipedia
