Kazuo Mori, also known as Issei Mori, got his start as a jidai-geki director in silent films of the 1930s. In postwar years he became a leading director at Daiei, working regularly with the studio's familiar stars like Shintaro Katsu and Raizo Ichikawa.

In the 1960s and '70s, Mori established himself alongside Kenji Misumi as one of the most dependable names in chambara franchise series, directing some of the best installments of Zatoichi, Kyoshiro Nemuri and Shinobi No Mono. Mori's work is marked by clear, intelligent storytelling and innovative camera techniques.