I'd advise you talk about things that you understand, else the comment quality of this place is only going continue slipping. Not sure why this political piece is ranking so high here in the first place. Or has the site degenerated so much so quickly? (haven't checked HN for ages..)
Then please provide sources.
Japanese birth rates plunge to record low: http://www.zerohedge.com/news/2013-06-07/japanese-birth-rate...
http://www.eastasiaforum.org/2013/07/21/drastic-change-in-im...
Immigration is also a hot topic in Germany, but they have:
- An influx of immigrants from the EU
- An influx of immigrants (from Eastern Europe) Some legal, some others, well
- Refugee influx (smaller than other countries like Italy and Spain, because of EU regulations)
But they have an easier "learning curve" , and are possibly (slightly) more open to immigration. The Turkish immigrants and their kids still face significant challenges
http://en.wikipedia.org/wiki/List_of_sovereign_states_and_de... in these lists
For 2013: Germany 1.42, Japan 1.39 (middle column). Well, small difference.
It's currently in n.10 http://en.wikipedia.org/wiki/List_of_countries_by_Human_Deve...
And IDH doesn't tell the whole story.