After reading the posted article regarding the thread (Sensationalism) with the bombing that occurred in Shinjuku, I was reminded of when it actually took place and the reactions I remember from Japanese friends. When this had happened, I was living in Kanagawa-ken at the time.
There was a surprise from my family members (who are Japanese) that this had happened as a kid. However, the impression I received and still is the same is that society in Japan in the larger cities is deteriorating when a youth. I haven't done any "studies," but only observed as a resident in the country (1990-96, and 1998-01).
I agree that adults commit most crime. However, the rate of crimes committed by youth has been on the increase. I have family that live in the Daiyama section of Shibuya, which is a quite nice area with boutiques, etc. Through the years, graffiti has been a growing problem. When I returned to live in Japan the 2nd time, it was really evident in that area. Bozuzoko groups had been on the rise, and had been more violent and destructive. Whereas 10 years ago, they just road on their motorcycles, making a lot of noise with their bikes, stirring up the police creating long drawn out chases. Now they are larger in numbers. I had the "treat" to watch a group in Sendai that painted their faces white. I carried baseball bats, swinging at pedestrians crossing at intersections, as the "bozo's" rode their motorcycles against traffic, ignoring signals, etc. I was almost hit while crossing at one point crossing the main street. The police were chasing these guys for at least an hour.
As for suicides, there is an increase in the youth. Peer pressure has increased so much in the schools that bullies are rising, adding to the pressure. I recall hearing in the news in the past couple of years, of quite a few suicides from this. There are shows on Japanese TV that address the problem quite regularly. Academics are decreasing with the "new generation" as compared to the last generation. Kids still attend after hour schools, but there is a decline at the same time. Chapatsu is on the rise, and is the cool thing for many high school kids, especially in Tokyo (namely in Shibuya). If you go to Shibuya on a Friday night, just sit at the train station there and watch it. Many kids travel from outside the area to "show themselves." It is quite a sight. It is a fashion/fad, and the attitude follows too. I would almost bet that within the next 10 years, the major cities in Japan will follow the same problems that the states have been having with almost the same frequency.
I still think that Japan is still by far a much safer country than in the states, though. You can still walk the streets late at night in the bigger cities, without having the same fear as if you were walking in Brooklyn at 1:00 am.
Regards,
Dana