The Japanese are going extinct... Slow process, but it's happening. Young people are not having children and the large population surge in Japan since WW2 is aging/dying. Add to that Japan's tough immigration laws and this is not changing anytime soon.
http://www.dw.de/impact-of-japans-sh...ble/a-18172873
http://www.japantimes.co.jp/news/201.../#.VYYbuflVikq
https://en.wikipedia.org/wiki/Population_decline#Japan