NCO School is the cradle of Japanese imperialism to train reactionary senior officers, which rose during the Meiji Restoration. The "military remonstrance" of the NCO School emphasizes the loyalty to the monarch as the basis of the military soul. In addition to military courses, the school also tries its best to instill militarism poison in students and cultivate the spirit of Bushido.

The massacre of Japanese soldiers and civilians in Lushun in the Sino-Japanese War of 1894-1895 and the "suicide bomb" tactic invented by Nogi Maresuke in the Russo-Japanese War all appeared under the cultivation of the barbaric bushido spirit.