And about Japan can wage war, I mean they have the superior technological gap for now, and they have everything necessary to wage a war, the JSDF is basically an army, but its only job is to defend Japan, change what they need to do, and they become an army in name and job. Biased from the author definitely, but at least he doesn't go all the way and say that Japan can do everything alone, since, by the point of the New World War arc, Japan is mostly winning because it's working with all the other nations and because the Valkas Empire is literally Imperial Japan with USA amount of resources (underestimating their enemies capabilities, hiding their losses, and just too full of themselves). So in a nutshell, the JSDF is pretty capable of waging a war (not full total war for years, but still capable for a few years at best), they just can't because of a certain law and two paragraphs in the constitution, that if removed, Japan can officially have an Army, that would just be the renamed JSDF to Japanese Army (JA) (or the Imperial Army, since they're an empire in name)