Kazuo Koike is a prolific Japanese manga writer, novelist, and entrepreneur. Early in Koike's career, he studied under Golgo 13 creator Takao Saito and served as a writer on the series. Koike, along with artist Goseki Kojima, made the manga Kozure Okami (Lone Wolf and Cub), and Koike also contributed to the scripts for the 1970s film adaptations of the series, which starred famous Japanese actor Tomisaburo Wakayama. Another series written by Koike, Crying Freeman, which was illustrated by Ryoichi Ikegami, was adapted into a 1995 live-action film by French director Christophe Gans.