Submarine I-57 Will Not Surrender

Submarine I-57 Will Not Surrender (Japanese: Sensuikan I-57 kofuku sezu) is a 1959 Japanese war film directed by Shūe Matsubayashi and produced by Toho. The production is notable for its special effects work by Eiji Tsuburaya, the celebrated effects director behind many of Japan's best-known genre films of the era.

Set during the Second World War, the picture tells a story built around the Japanese submarine I-57, whose crew, as the title suggests, refuses to surrender. It belongs to the wave of Japanese war dramas of the period that looked back on the conflict through the lens of naval and submarine warfare.

The cast includes Ryō Ikebe, Akihiko Hirata, Akira Kubo, Susumu Fujita and Andrew Hughes. The film was shot in Japanese and stands among Matsubayashi's war-themed works for Toho.