For Yakuza 4, I doubt they would cut as much as 3 considering how SEGA have said they want to make the franchise at least a minor hit outside of Japan and by just how many fans they made mad by removing the simplest of things. The hostess bars cannot be cut as one of the characters owns one and it plays a major part of his story, so there is this at least.
As for the Haruka scene... I do not think that is all that bad when you consider the other sexual innuendos that go through the series. What they can do with the scene Chizzles mentioned is they can just say the guy is hurting Haruka, and it makes Kazuma mad. I guess the fanbase would freak out poorly again, but whatever!
In a similarly related topic, I have no idea how they would ever translate Kenzan (not that I ever expected them to), as the first scene in the game [spoiler:3ol0lqcm]shows young girls being sold off into prostitution.[/spoiler:3ol0lqcm] It would be hilarious to see how anyone could make that look like anything else.