Akira Kurosawa made this commercial and accessible film as a way to repay Toho Studios for allowing him to make riskier, more artistic fare such as Rashômon (1950). It was later one of the greatest inspirations for George Lucas' first Star Wars (1977) film.
In an interview for the Criterion collection DVD, George Lucas stated that while this film is a story about a princess and her protectors that this was not the primary element that he employed in Star Wars. He stated that he was more concerned with the way that Hidden Fortress is told through the eyes of two lesser characters. In Hidden Fortress it is the two thieves; in Star Wars it is C3PO and R2D2. In both films the comical interplay between the two characters is a major theme.