Investing in Nikkei, is it too good to be true?

[tescorank]

Nikkei reaches 20,000: will it hit '63m' by 2025? | via @Telegraph http://www.telegraph.co.uk/finance/personalfinance...

[Lardydah]

Glad the article mentioned the currency risk, as that's the first thing that popped into my head!

Isn't Japan supposed to be heading for some ageing population disaster? Probably enough to put me off any large allocation there.