suicide: 22.9%
cancer: 22.7%
accidents: 11.7%
In the US, the major causes of death among children and adolescents are motor vehicle crashes and firearm injuries, and then cancers.[0] So maybe, with somewhat less motor vehicles and far less firearms, the suicide rate in Japan is unusual.
Maybe a Japanese speaker could find the actual data.
Many people run over by trains ( to mention a relatively common occurrence in Tokyo ) are put in the 'accidents' statistic chart as well, even when it is no such thing in some cases, but a clear, deliberate suicidal act. I speak from personal experience, and not just once. For many reasons, even though it's obvious for everyone and there might even be witnesses to the event, better to avoid the stigma.
Likewise in Real Estate companies having to disclose such events in their properties. Much easier to deal with an 'accident' than a 'suicide' in an otherwise perfectly good apartment.
The issue is probably underreported in every demographic, children and pre-teens included.
As I understand it, they have 220 school days per year versus 180 in the US and they are expected to join study groups and the like "voluntarily," which de facto eats up a lot of their remaining free time.
I think the most charitable read it can be given is that a densely populated island nation has innate performance pressure. If you don't creatively squeeze every drop from the local resources, you face a population collapse. The high pressure culture is a attempt to mitigate those things.
I do get your point and I didn't downvote you. But I think you are probably missing this piece of the puzzle.
[0] https://en.wikipedia.org/wiki/Suicide_in_South_Korea#/media/...
I know very little about it and I'm aware of this element of pressure contributing to the high suicide rate for teens. So it's no doubt more complicated.
So whats left? Isn't suicide an acceptable way to die in Japan?