The entire infrastructure for this kind of endeavour -- that is, having lots of children -- has gone and not only in Japan. Biology does not work by restoring t

The entire infrastructure for this kind of endeavour -- that is, having lots of children -- has gone and not only in Japan. Biology does not work by restoring the birthrate, I suspect. I guess it rather works by exponentially growing the sub-populations who still have these high birthrates: 1 - 2 - 4 - 8 - 16. In other words, I strongly suspect that most of the current Japanese population will have no descendants in a few generations, while a small, distinct subgroup will produce all of the population. So, all Japanese in a hundred years or so will descend from the few Japanese that tend to make ten children today.