Sanshiro Sugata (Japanese: 姿三四郎, Hepburn: Sugata Sanshirō, a.k.a. Judo Saga) is a 1943 Japanese martial arts drama film and the directorial debut of the Japanese film director Akira Kurosawa.

First released in Japan on March 25, 1943 by Toho film studios, the film was eventually released in the United States on April 28, 1974. The film is based on the novel of the same name written by Tsuneo Tomita, the son of prominent judoka Tsunejirō Tomita, published in 1942. It follows the story of Sanshiro, a talented though willful youth, who travels to the city in order to learn Jujutsu. However, upon his arrival he discovers a new form of self-defence: Judo. The main character is based on Saigō Shirō.

The film is seen as an early example of Kurosawa's immediate grasp of the film-making process, and includes many of his directorial trademarks, such as the use of wipes, weather patterns as reflections of character moods, and abruptly changing camera speeds. The film itself was quite influential at the time, and has been remade on no fewer than five occasions. It spawned a sequel, Sanshiro Sugata Part II, which was released in 1945 and also directed by Kurosawa.