No sex. There is some very mild nudity. Men taking baths. A group of boys about 7 years old jump into an Onsen (bath) and very briefly are seen naked.
Very mild profanity. One or two "son of a bitch's" over the course of the entire movie. Nothing more. Maybe an "ass". Not a noticeable thing in this one.
No drugs. Talk of Sake (rice wine). Some characters seen drinking Sake, not in too much excess though. Mild smoking. Not seen throughout most of the movie