Yakuza is a very japanese game.
It is has a serious narrative about crime, politics, family issues, corruption and honor. And in the next scene you're spending thousands of dollars (yens?) on a custom toy car to win a slot car championship or building your own go kart and race against other gangster.
Let's just say that this is not too out of the ordinary.
I don't have this problem because whenever I'm in public I have my headphones on. Even if I'm not listening to anything on them they're still good enough to muffle every other sound blasted by others.
It's easier to adapt myself than it is to educate everyone else I guess.