One Wonderful Sunday (Japanese: 素晴らしき日曜日, Hepburn: Subarashiki Nichiyōbi) is a 1947 Japanese film directed by Akira Kurosawa and co-written by Kurosawa and Keinosuke Uekusa. The film was produced by Sojiro Motoki for Toho Studios and stars Chieko Nakakita and Isao Numasaki. It was made during the allied occupation of Japan and depicts a young couple who, with only 35 yen between them, go on a date together on the only day of the week they can see each other.

The film was produced and released in Japan in 1947, and depicts the challenges of life in early post-War Tokyo. One Wonderful Sunday received generally positive reviews out of a few mixed reactions, it marked the first instance wherein Kurosawa received an award for his talent as a director. The film is notable in the Kurosawa canon as the director's only shomin-geki, reviews focussed on a fourth wall-breaking scene at the climax.