Underworld Beauty (1958 Japan)

 Underworld Beauty (1958 Japan)

Ankokugai no bijo

 A gang is after some diamonds one of their defecting members swallowed just before he committed suicide. His close friend, Miyamoto, takes it upon himself to protect his younger sister, Akiko, who is now in danger, not only from the yakuza who want the diamonds but also from starting down the path of crime which led to her brother's death. Akiko doesn't even have the diamonds; she never even knew about them. (IMDB zetes)