[sarasi]

The number of Japanese people who work for 4-5 months and then go to developing countries must be tiny, and hardly the cause of a "social crisis" here.

What has been concerning people is the number of young people who drift from low-paid job to low-paid job (inside Japan) without showing any signs of wanting to settle down- they're called "freeters", if you Google it you'll find lots of info. Also of concern are the hikkikomori and "NEET" people, mostly young guys.

The social issues Japan has at the moment and the differences between generations can't really be generalised about like the woman you spoke to did- it's far, far more complicated than that.