Eiji Ōtsuka (大塚 英志, Ōtsuka Eiji, born 28 August 1958 in the former Tanashi, Tokyo) is a social critic, folklorist, media theorist, and novelist. He is currently a professor at International Research Center for Japanese Studies, Kyoto. He graduated from University of Tsukuba with a degree in anthropology, women's folklore, human sacrifice and post-war manga. In addition to his work with manga he is a critic, essayist, and author of several successful non-fiction books on Japanese popular and otaku sub-cultures. He has written the Multiple Personality Detective 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.