Nothing much.

A man is shot in the head (this is more graphic in the Japanese version where we actually see the bullet impact). One man is crushed by falling concrete and pieces of a building-no blood, screaming heard. His body isn't shown. Sci-fi monster violence between Godzilla and Mothra... no blood.

Some light profanity.

Some people drink casually and characters smoke.

Some people may find the monster fights intense.