&gt;Japan is an old nation<p>Japan as a unified nation in the modern sense is newer than the United States of America. Prior to the Meiji Restoration in the 1860s Japan was a feudal society lead by warlords. The rule under the Tokugawa shogunate was relatively stable, but it was still a feudal society.<p>I don&#x27;t think anyone is claiming Japan will cease to exist as a country and that the Japanese people would die out, but something with as radical a change as the Restoration (Which included multiple civil wars...) would probably not count as the nation just correcting itself. It is the effective death of one form of the nation and the birth of the other.