Unlike the US, there does seem to be a recognition that people are part of the economy of the country and that there are mutual shared interests in making things work. The issue seems to be more in the speed and adeptness at which changes are made.
That being said, the biggest obstacle to start-ups in Japan is the Japanese aversion to risk. The most talented people would rather work for peanuts in large Corporations or in secure Government jobs rather then risk failure in a start-up.
There seems to be a lot of "don't give old people this" whenever the question of age-based rules comes up.
I think there are 2 big reasons why you won't find many Japanese expats in Europe. One is the real or perceived language barrier. The level of English education in Japan is pretty low, and even people who speak passable English tend to be not confident about it.
The other reason is outlined in the article. Going abroad for college isn't prized as it is in (say) China. You're deviating from the path that society expects you to follow. You might even get strange ideas about life/work balance. Going abroad for a "skip year" sounds even worse.