Kajirō Yamamoto (山本 嘉次郎, Yamamoto Kajirō, 15 March 1902 – 21 September 1974) was a Japanese film director, screenwriter, and actor who was known for his war films and comedies and as the mentor of Akira Kurosawa. The combined list of his efforts as a director for documentaries, silent, and sound films includes over 90 film titles during his lifetime.