I know a bit of Japanese mentality, just because I read a lot. My education is almost all Western. In many cases it's noticeable a identity crisis caused by cultural difference. Here in Brazil, we are Japanese, in Japan, we are Brazilians ... But I agree with your perception... I realize something stressful in their formal thinking and the Japanese worry excessively about it. Each culture is unique. But I believe that my perception of Japan is westernized.