They are going to fade from the world stage. Xenophobia + birth rate < replacement rate = extinction.
Your equation is lacking.
birth rate < replacement rate = extinction1. Only if such continues until population is zero.
2. Xenophobia has nothing to do with it. Even if those numbers were replaced with Oaxacan immigrants, the Japanese would still be extinct, because Japan would no longer be Japan, but "Oaxaca East."
3. Immigration retards the birth rate of the locals. Increasing immigration significantly would likely retard Japan's birth rate even more, just as mass immigration retards American birth rates.
Assuming current birth & death rates in Japan and zero immigration, in 2100 Japan will have the same population they had when they defeated Russia on the mainland of Asia in 1905.
No no no. According to rooster, their lack of immigration has made them a paradise.
[bob_dole]Yeah, stop lying about my record.[/bob_dole]
Paradise? Not so sure. But it sure has maintained their standard of living.
The USA would likely greatly benefit from zero immigration going forward and expulsion of the 40million currently in the USA. My wife and I are not the only family that limited the number of children we had due to the deleterious effects of mass immigration on the cost of raising a family.