Murder of Aiwa Matsuo
On July 26, 2014, 15-year-old Japanese high school student Aiwa Matsuo (松尾 愛和, Matsuo Aiwa) was murdered by a 15-year-old female classmate. The killing took place in the suspect's apartment in Sasebo, Nagasaki Prefecture, where Matsuo was beaten with a metal tool, strangled to death, and then partially dismembered and decapitated. In Japan, this case is known as the Sasebo high-school girl murder case (佐世保女子高生殺害事件, Sasebo Joshikōsei Satsugai jiken).