I'm speaking from a Japanese cultural point of view, here. To say that Japan has been wrong until now to focus on family values over rampant individualism, waiting until you are married to leave the home, and respecting the lives of the elderly until they pass on is one I've never heard before. And where do you get that their education takes a backseat by living with their parents? Post secondary education has always been a pillar in Japan.

Until this most recent generation Japan (and the rest of the world) had no problem starting a "life and family of their own" as you put it.

> family values over rampant individualism

This isn't binary. And it doesn't appear Japan has ever had rampant individualism. They seem to punish any personal expression and lifestyle outside very narrowly defined norms. Supposedly for "family values", which overwhelmingly benefit old men.

> ...respecting the lives of the elderly until they pass on is one I've never heard before

How is leaving a parent's home before marriage disrespecting the elderly? Are parents owed unpaid caretaking by people who had no say in birth, childhood, and youth?

> Until this most recent generation Japan (and the rest of the world) had no problem starting a "life and family of their own" as you put it.

I don't think the problem is the kids. I think the problem is cultural expectations of parents. When kids become adults they can choose any values they like. Parents don't have to agree, nor do they have to enable entirely selfish behavior. Of course if parents create an economic disaster and a culture of dependence, well, then everyone gets to reap what the parent's (and their generation) have sowed.