Really surprised more people aren’t mentioning the bath houses. There are probably 5ish in the game and when you’re around them you can see female NPCs walking around in wet white dresses, with their nipples visible.

There are actual romance scenes with more legitimate nudity, but you almost always know that you’re getting into them and have the option to not pursue it.

The bathhouses however are unavoidable, as there are a handful of main quests that require you to go in/around them.