It is funny you should mention Japanese culture. I have been doing some very light research on that recently. I would consider Japan the most Westernized of Eastern cultures, and the struggle between the two makes for a very interesting cultural situation. I had some one on one discussions with a number of Japanese college students, it was quite interesting. They had only been in America for one and a half semesters so far and are preparing to return to Japan in just a couple of weeks, so the American culture is still very new to them. One guy asked me why I was wearing a short sleave shirt at the end of Feburary. I told him because it was a warm day it felt comfortable. He told me in Japan they have certain etiquette which they follow and you only wear t-shirts in the summer, which started exactly on the 1st of June. He said you could go to Japan and you will not see anyone with a t-shirt anytime before June first, no matter how hot it is before then. On the flip side, at the moment he asked me the question he was wearing a t-shirt shirt himself, so I asked him why he was wearing one at the end of Feburary, and he told me "Hey, I am in America. It is a warn day and it feels comfortable." I found that the Japanese have a very strong respect for rules, even traditional ones that are not enforced by anyone. You simply don't go outside in only a t-shirt before June 1st, just like you simply don't do a number of other things. I found it interesting that these rules are only applicable in Japan. There were any number of these rules that they would break while here in American but once they get back to Japan they wouldn't dream of breaking etiquette.