Hideo Yamamoto is a Japanese manga artist. He received the "Tetsuya Chiba Award", given to promising young manga creators in 1988. After resigning from the post of assistant of a popular seinen manga artist, Kenshi Hirokane, he made his professional debut by drawing "SHEEP" (written by Masahiko Takasho) for Weekly Young Sunday in 1989. Martial arts are his interest. Recurring themes in his manga are crime, sexual deviations and human mind. Before creating Homunculus, Hideo Yamamoto actually lived as a homeless person for sometime in order to be able to credibly include the theme of homelessness in his work.