It is a place rich in natural resources, having everything we need for national defense, a crucial place for the empire's self-reliance. The place is crucial too for our wars with China, Russia, and the U.S.
About sending troops to China's northeast. March 1931, from speech entitled "Manchuria and Mongolia from the Military Point of View". Quoted in "China in the World Anti-Fascist War" by Peng Xunhou - Page 23 - 2005.