It’s part of a pattern of hundreds of kids murdered or seriously injured. Read for yourself
http://www.asianews.it/news-en/Alarm-in-Japan-for-child-judo-deaths-20425.html
More than 40 Taiwan kids have been murdered or seriously injured in judo class
These are not outliers
They are part of a pattern.
And Japanese tv shows glorify sadistic rituals for someone wanting promotion or to join a group