Saigo no dasso (1957)

In the last film of Hara Setsuko's career involving wars, a group of Japanese nursing students and their instructor played by Hara, is serving at an army camp in China. When Japan loses the war the group sets out to depart China, but en route back to Japan is captured by the Chinese and coerced to instead treat the Chinese army at a clinic. Caught with the group is also a Japanese doctor. When the Chinese army faction itself loses in battle the Japanese plan their escape.