Said in another way: they will just tell you the positive stuff and will discard negative things. Why? Because for them "projecting negativity" is something plain bad and wrong. This is the reason, for example, why it is almost impossiboe to see a japanese crying in public. That is projecting negativity. They will not go and tell you: "man, how did you comb today you look crazy", even if it is what they are thinking. And like this, millions of things. So maybe you think they are polite or even they like you just bc u dnt get any of this, but observe further: they put distance, they do not make you into their groups except for really formal appointments (business, work), etc. No, it is not easy to get integrated in Japan. It is just not easy.
That they are amazingly polite when dealing with you does not mean you are fully integrated at all.
It means they are polite. Nothing else. If you do not believe me, try to make yourself the person in a group surrounded by japanese. It is very likely, to say it plainly, that you are not just accepted as one more in their circles. For business yes, for close friendship, I doubt it in most cases though this varies a bit in bigger places.
It is really tough.
