Kazumasa Hirai (平井 和正, Hirai Kazumasa, May 13, 1938 – January 17, 2015) was a Japanese novelist from Yokosuka, Kanagawa. He graduated from Yokosuka Industrial High School and the law department of Chuo University. Hirai is well known for his SF-manga work. He is the creator of 8 Man.
NovelWolfcrest 1, translated by Edward Lipsett. Tokyo: Kodansha English Library. 1985. ISBN 4061860135. (The anterior half of Ookami no Monshō)Wolfcrest 2, translated by Edward Lipsett. Tokyo: Kodansha English Library. 1985. ISBN 4061860143. (The latter half of Ookami no Monshō)Short story"A Time for Revolution," translated by David Aylward. Speculative Japan: Outstanding Tales of Japanese Science Fiction and Fantasy, Tokyo: Kurodahan Press. 2007. ISBN 4902075261 (original title: Kakumei no Toki)Megalopolis no Tora (1968)Android Oyuki (1969)Wolf Guy Series [ウルフガイ・シリーズ]Adult Wolf Guy Series [11 volumes]- Ookamiotoko da yo (He's a Werewolf!, 1969)
- Ookami yo, kokyou wo mi yo (1973)
- Rio no Ookamiotoko (1973)
- Jinrou Jigoku (Wolf Guy Inferno, 1974)
- Jinrou Sensen (Wolf Guy Front, 1974)
- Ookami wa nakazu (1974)
- Jinrou Hakusho (Wolf Guy Report, 1976)
- Jinrou Tenshi {3volumes} (Wolf Angel, 1978–1980)
- Wakaki Ookami no Shouzou (Portrait of a Young Wolf, 1979)
Wolf Guy Series [19 volumes]- Ookami no Monshō (Wolfcrest, 1971)
- Ookami no Enka (1972)
- Ookami no Requiem {2volumes} (1975)
- Ougon no Shoujo {5volumes} (Golden Girl, 1985–1994)
- Inugami Akira {10volumes} (1994–1995)
Gekkou Majutsudan Series [30 volumes]- Gekkou Majutsudan {12volumes} (Moonlight Magic, 1996–1998)
- Wolf Guy DNA {12volumes} (1999–2000)
- Genma Taisen DNA {6volumes} (Genma Wars DNA, 2002)
Wolf Guy Extra Volumes- Wolfrando ~ Ookami no Sekai (Wolfland ~ The World of the Wolf, 1976)
- Megami Henshou (1988)
Cyborg Blues (1971)Zombie Hunter [死霊狩り(ゾンビー・ハンター)]Zombie Hunter (1972)Zombie Hunter 2 (1976)Zombie Hunter 3 (1978)Akuryō no Joō (1976)Genma Wars Séries [幻魔大戦シリーズ]New Genma Wars (1978)Real Genma Wars (1980-1985)Genma Wars (1979-1983)Armageddon (1987)Armageddon Girl（The Girl in Harmagedon (closet screenplay) ハルマゲドンの少女） (1986)Genma Wars deep (2005)Genma Wars deep Toltec (2008)Chikyuuju no Megami [地球樹の女神]Chikyuuju no Megami (1988-1992)Crystal Child (1997)Sono hi no gogo, Hôdaiyama de (2004)Bohemian Glass Street {9volumes} (1995)21st Century 8 ManInfinity Blue (2002)Blue Series- Blue Highways (2002)
- Blue Lady (2005)
Abduction SeriesJikuu bôsô kimagure Bus (2001)Wayward Bus (2003)Stray Sheep (2003)Abduction (2003)Silence (2003)Shade (2003)Capricious (2003)8 Man (artist: Jiro Kuwata)Elite (artist: Jiro Kuwata)Chou ken Leap (artist: Jiro Kuwata)Genma Taisen (artist: Shotaro Ishinomori)Desu Hunter (artist: Jiro Kuwata)Wolf Guy (artist: Hisashi Sakaguchi)Spider-Man: The Manga (artist: Ryoichi Ikegami)Shin Genma Taisen (artist: Shotaro Ishinomori)Crystal Child (artist: Ayumi Izumitani)Bachigami (artist: Yuuki Yogo)8 Man Infinity (8 Man sequel: Kyôichi Nanatsuki, artist: Takayuki Takashi) 