In Japan, we should be modest in public. Japanese regards “being modest” as a beautiful virtue, so we dislike people who are vain and take pride of themselves.
One famous example is that Japanese saying “It’s a trivial present” when they give a “wonderful” present. This humble attitude is a virtue in Japan.
I found that I practice this attitude without realizing in the US. I noticed my “inappropriate” behavior when I was pointed singled out.
This is one culture shock which I experienced here, NY.