在第二次世界大戰時，日本軍隊的惡行惡狀，在當時犯下了眾多的罪行，如：南京大屠殺、731 部隊生化戰等。許多亞洲國家對於二戰時的日本不甚理解。時至今日，周遭國家不時地傳出要求日本為第二次世界大戰所造成的傷害道歉。 二戰日本軍隊的核心價值在於「愛國、愛天皇」，而此種價值觀也包含了許多外在的影響與象徵因素，且在各方面要求日本軍人對天皇盡忠， 對國家有所貢獻。但其「愛國心」乃源自於「日本是超越於其他亞洲國家，是引領東方反抗西方的存在」的想法，從此角度看來，〈脫亞論〉的確是後來日本走向激進的因素之一。

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.