The actual question is if you could move to another country with a very different system of "manners" (read: culture) and throw out your learned behavior and adopt theirs.

My experience living in an incredibly multi-cultural immigrant dense area, is overwhelmingly "No". People like their "home" cultures (generally they believe its the best), and they tend to carry some degree of resentment for their new society for not recognizing that. It creates endless friction at the edges (whereas core values tend to be pretty similar globally).

Japan doesn't really deal with this at all, and what immigrant ingress they have is usually fueled by people trying to live a Japanese like life.