National Mobilization Law (国家総動員法, Kokka Sōdōin Hō) was legislated in the Diet of Japan by Prime Minister Fumimaro Konoe on 24 March 1938 to put the national economy of the Empire of Japan on war-time footing after the start of the Second Sino-Japanese War. The law was attacked as unconstitutional when introduced to the Diet in January 1938, but was passed due to strong pressure from the military and took effect from May 1938. It was abolished on 20 December 1945 by the American occupation authorities after the surrender of Japan.