Birthplace: Miyagi Prefecture, Japan
He is a Japanese screenwriter and novelist. He is a graduate of Waseda University, School of Human Sciences.
In 2006, Okouchi collaborated with director Goro Taniguchi for composing the story and script of the Sunrise original production, Code Geass - Lelouch of the Rebellion. (B-U)
His name is also spelled: Ohkouchi, Ichirou