>>41994Thing is it wouldn't disappear, but they would have to deal with basically a generation of hardship until the dependents die off and the inefficient parts of the government and economy collapse.
It would be bad, like really bad, but it wouldn't be the end of Japan.
That said, mass importation of foreigners just might. Or at least fundamentally change it for the worse and damage it in ways it will never be able to recover from.