“"There is practically nothing indigenous to Japan except the silkworm. They lack cotton, they lack wool, they lack petroleum products, they lack tin, they lack rubber, they lack great many other things, all of which was in the Asiatic basin.They feared that if those supplies were cut off, there would be 10 to 12 million people unoccupied in Japan. Their purpose, therefore in going to war was largely dictated by security."(昭和26年5月3日米国議会上院・軍事外交合同委員会)