Their society has aspects to it that are suppressive and don't tolerate younger people questioning older people.
Violence through other means like knives seems to be increasing (correct me on that if I'm wrong).
The work hours they put force employees to go through is apparently taking it's toll on their society.
I'm predicting we'll see more issues in their society. I'd be glad to be wrong but they do have social issues to take care of just like most other countries.
Sounds a lot like how I hear it's done in the US, a la "plea bargains".
When fully half of your population walks away from one of the most important pillars of your society, you are screwed if you don't change.
The criminal justice system of Japan has a conviction rate that exceeds 99% (Note that it includes guilty plea cases.[1]), which has been attributed to low prosecutorial budgets impelling understaffed prosecutors to present judges with only the most obviously guilty defendants.[1]
Now, I'm no expect on the matter, perhaps neither are you.
However,I would appreciate more context than your comment provides because the way you've framed it makes it seem like an obviously bad thing, which, on closer inspect, may not be the case.
For 2012, the US Department of Justice reported a 93% conviction rate.
In 2013/2014, 63% of all cases completed in adult criminal court resulted in a finding of guilt. This proportion has remained relatively stable over the past ten years. In 2013/2014, 32% of all completed cases were stayed or withdrawn, and 4% of cases were acquitted. The remaining 1% of completed cases resulted in another type of decision, such as the accused was found not criminally responsible on account of mental disorder.
Source: http://www.statcan.gc.ca/pub/85-002-x/2015001/article/14226-...
[1]: https://en.wikipedia.org/wiki/Prison_rape_in_the_United_Stat...