North Korea will extract money from South Korea simply by threatening to attack it, getting richer and stronger militarily while South Korea gets poorer.

China's fertility rate will fall below South Korea's within five years.

Over the next 10 years Japan will try to solve its demographic crisis by massively attracting immigrants.

If Japan does not solve its demographic crisis this decade, it will cease to exist as a nation-state within 50 years.

War will cause rapid population decline in East Asia and governments will then encourage births.