The Fall of Ako Castle is a 1978 Japanese historical martial arts period film directed by Kinji Fukasaku. It depicts the story of the forty-seven Ronin (Chūshingura). The film is one of a series of period films by Fukasaku starring Yorozuya Kinnosuke, including Shogun's Samurai.
The film received one nomination for the Award of the Japanese Academy for best cinematography.