During the 2nd World War, the brutal and cruel actions of Japanese army have made a lot of crimes at that time, such as Nanking Massacre and Troop 731 Bio-chemical Warfare etc. Many people of asian countries could not understand why Japan involved in the 2nd World War. Up to now, some East Asian countries sometimes urge Japan to apologize for the harms caused by their 2nd World War. Japan’s core value of Japan 2nd World War is their “Patriotic and Love Mikado”. Therefore such values contained several outside influence and symbol factors. Due to these values, Japan asked their soldiers, to keep faith with Mikado and contribute them to the country. However, their “patriotism” originated from the idea of “Japan is superior than other Asian countries and is able to lead the existence of eastern countries against west. On this angle, Datsu-A Ron is exactly one of the factors inspiring Japan’s radicalness.