Having a background in the mining industry, I was chatting with a guy, and were mining coal as the saying goes. And he brought up a fact, and I cannot prove or disprove it about Japan, several years before Pearl Harbor. He was saying that along with scrap metal, and everything else they could gather, they were also buying lots of coal. And they were storing the coal in a large bay, filling the bay with coal to be used for the war. So I was wondering if any of the WW2 buffs have ever heard of this story