The renaissance of the modern Japanese nation is often reduced to technical concepts such as rigor or seriousness. This overlooks the religious and ideological load of this renaissance that is radically linked to the ancient culture of the Japanese.

On August 9, 1945, the U.S. Department of War released a documentary about the war in the Pacific directed against Japan entitled "Know Your Enemy: Japan" The film was based on an intelligence report before the invasion of Japan during World War II entitled "Japan's Soldier Psychology" It detailed the "emotional and barbaric" Japanese personality traits embodied in the Japanese soldier.