One Wonderful Sunday is a 1947 Japanese film co-written and directed by Akira Kurosawa. It was made during the allied occupation of Japan and shows some of the challenges of life in early post-war Tokyo. The film is notable in the Kurosawa canon as the director's only shomin-geki, and because of a fourth wall-breaking scene at the climax. It is in black-and-white and runs 108 minutes.

Akira Kurosawa was a Japanese filmmaker and painter who directed 30 films in a career spanning over five decades. He is widely regarded as one of the greatest and most influential filmmakers in the history of cinema. Kurosawa displayed a bold, dynamic style, strongly influenced by Western cinema yet distinct from it; he was involved with all aspects of film production.