Eiji Otsuka is a social critic and novelist. He graduated from college 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 writes 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 . In the 80s, Otsuka was editor-in-chief of Manga Burikko, a leading women's manga magazine where he pioneered research on otaku sub-cultures in modern Japan. He has published a host of books and articles about the manga industry.

The author lives in Tokyo, Japan.