Minimal. No scenes with sex or nudity, but some scenes feature women in bathing suits. Also, there are multiple scenes showing women with cleavage. Several passionate kisses between a married woman and a single man.

Several people are shot throughout. The scenes in which they are shot are never graphic or gory, but often intense and/or surprising.

None.

Probably half of the people on the screen are smoking at any given time. All major characters smoke.

Several scenes where people are drinking; they often become intoxicated as a result.

The scene in the fun-house hall of mirrors is not gory or graphic, but quite intense. It may be a little frightening to younger viewers.

Overall: The Lady from Shanghai, having been released in the 1940's, was not rated using today's rating system; it was simply "Approved".

Most likely rating it would be given by the MPAA today: PG-13 for violence, smoking, and alcohol use.