By some measures at 127 million inhabitants Japan is overpopulated. Example of such measures:<p>- Japan only produce enough food to feed half of its population, so an embargo on food imports would certainly result in a massive population shrinkage.<p>- Japanese people are concentrated in small plains: there is physically very little space.<p>On the other hand I&#x27;ve lived in Japan and love it, but I don&#x27;t think population growth would be a reasonable option at this point.