Social crisis in Japan because of young peple.
 

some thing

That's way too much over-generalization. I would say less than 5% of young Japanese did what she told you they did.

Don't believe everything you hear.

I have read studies that do point out some of these things, but its way over generalized. Yes there is a problem with the amount of children born in Japan thats a fact because of how expensive it is to raise a child in Japan among other factors like the stigma of mental health treatment. But to classify an entire generation as lazy is another matter. Just like any country Japan is constantly changing though more slowly than some developing countries. There are bound to differences in how every generation views the world.

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.

To be honest, as a young person, I think this sounds like 90% of young people all around the world. The number of times I hear "I can't be bothered with this." I'd say its a global thing rather than confined to Japan, but obviously the Japanese way of life is more organised the other nations, so 'problems' will be clearer to see.