A Brighter Summer Day (1991)

There's a nude image on the wall of a certain room but it is only briefly seen and perhaps easily missed

A group of boys discuss the color of a woman's panties. Later, they come up behind her and lift her dress to up to confirm the color. This is brief and her panties aren't shown to the audience.

An actress changes her outfit behind a towel, and the camera shows this from above, but it's dark enough in the studio that nothing is noticeable.

An older teen hits a rival gang member in the head with a brick. It is shown on-screen but not too graphic. He is later picked up unconscious and blood is seen pouring out of his mouth.

There's several gang fights and deaths, one being the climax of the film. There's some blood, but not a lot of it.

About a dozen or so uses of "fuck", other (lighter) words used sparingly here and there.

Teenagers smoke cigarettes and drink alcohol.

There is a scene of a father mercilessly beating his child with two household items in succession, mother and sisters stand in the background, trying to intervene at some point but the father keeps going. Mother and sisters scream and wail, and throw themselves at the child being beaten in attempt to save him. Scene is highly distressing and may trigger viewers.