This map is taken from google analysis report (showing clear world digital divide). Access from Japan includes me so it's not reliable. The top 10 access list is
Japan (not reliable)
So, lets predict the future of these countries. Below are the links to a site that calculates an estimated population pyramid 10 years in the future.
The points are,
1) Absolute value of younger people's population
1) Japan is bad because the number of younger people are getting less and less.
2) Japan is bad because this value is very large.
These are just two and they don't describe all, of course.
I have my own opinion about the future of other countries but Japan but it may be controversial, so I will not tell it.
and these are several other interesting population pyramids:
United Arab Emirates
If your country is not on the above links, you can get it from this page.