How can the transposed Japan even function? Japan relies heavily on oil, coal and natural gas to keep running. Like, they are the among the top importers of the stuff in the world, if not number one. Yet when fantasy land ambassadors visited Japan cars were running just as normal. They can keep an expeditionary force running like this with seemingly no problem. Only thing they seem to have needed in this manga so far is food, for which they do rely on imports for heavily in the real world but not as much as they rely on energy imports. It's like fuck logistics, we just wanna sit on high horses and see JSDF massacre savages...