Okada was born in Osaka and attended Osaka University of Arts. He has written several Japanese-language books on otaku culture, and lectured on the topic as an adjunct instructor at Tokyo University from 1992 to 1997. He is considered the foremost authority on otaku and in addition, in a tribute to his own otaku-ness has been crowned "OtaKing" amongst his colleagues and fellow otaku.
- Daicon IV Opening Film (1983)
- Royal Space Force: The Wings of Honneamise (1987)
- Gunbuster (1988)
- Otaku no Video (1992)
- (Japanese) Otaking Space Port: Toshio Okada On The Web
- Toshio Okada at the Internet Movie Database
- A Review of "You Otaku Are Already Dead"
- Return of the Otaking: Toshio Okada at Anime America '96 -(introduction)
- Takeda 2002.
- "In those days, we didn't have the word "otaku" yet, but my first impression of Okada was, Here's a geek if I've ever seen one.' With his girly long hair and his freakishly excited way of speaking, all I could think was, This guy is exactly like me? pg 31, Takeda 2005
- Takeda, Yasuhiro; Yu Sugitani, Yasuhiro Kamimura, Takayoshi Miwa; translated by Javier Lopez, Jack Wiedrick, Brendan Frayne, Kay Bertrand, Gina Koerner, Hiroaki Fukuda, and Sheridan Jacobs (2002, 2005). The Notenki memoirs: studio Gainax and the men who created Evangelion. ADV Manga. p. 190. ISBN 1-4139-0234-0. Cite uses deprecated parameter
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