Kanagawa University
Hiroyasu Koga ( "Koga Hiroyasu", born 15 August 1947) is a former Tatenokai member and kaishakunin responsible for the decapitations of Yukio Mishima and Masakatsu Morita during their "seppuku" on November 25, 1970. He studied law at Kanagawa University and intended to become a lawyer.