Eiji Ōtsuka(大塚 英志Ōtsuka Eiji, born on August 28, 1958 in the former Tanashi, Tokyo) is a Japanese writer. He writes the MPD Psycho and The Kurosagi Corpse Delivery Service manga series. One of his first animation script works was Mahō no Rouge Lipstick, an adult lolicon OVA. Ōtsuka was the editor for the bishōjo lolicon manga series Petit Apple Pie.