Earlier this week, I met up with Sega to see the US version of Yakuza 4 and I think fans will be happy to know only two parts were changed. The Answer X Answer arcade mini-game was unfortunately removed. The team was not able to localize the quiz game since text is in images, which cannot be edited.
The opening video was also changed. Licensing issues prevented Sega from bringing the original song, "Butterfly City" from Zeebra overseas. Instead, Sega created a remix of "For Faith" from Hidenori Shoji to replace the song. All other songs, including the install screen track, are intact.
All of the hostess side-stories and ping pong mini-games (with a stare command) are in the English version of Yakuza 4. Interesting fact about the create-a-hostess game within a game – her self-esteem stat will be higher if you don’t force her to wear makeup. If you make your hostess alter her appearance with ton of makeup and colored contacts her stress with skyrocket and her self-esteem will plummet.