Japan: Collapse or robot future?

Wow, it baffles me to see that there are reports globally that the planet is overpopulated. That we are in an exponential increase of populations that need to cease. But then there are countries like Germany and Japan that have populations that are starting to dwindle down. I mean obviously, population stabilization isn't easy, but filling your country with robots doesn't really solve the problem. The route that Japan is going seems to be the route that countries like France, England, and the U.S. will eventually go on.