because of the pressure that their society put on them. In Japan the school system can be very stressful. They go to school from 8 to 5 and then 6 to 9 known as cram school. When they fail to make the grades they feel that they have bring shame to their family. It is also true for those who are their mid-life who over work themselves.
i watch tv , there s a very nice mouantian in Japan where is very famous and attractive for suicider !! the reason why do those japanese kokrean like to suicide , i think because , those people are living under presure in their soceity, family and business.. they thought that dying could resolve all the problem...
Because they take their works very seriously. They'd rather commit suicide anddie honourably rather than living in shame. I heard a story of one Japanese train driver committed suicide after his training was late for the first time in years. That's one of the reasons why their economies are light years ahead of us.
This part of their traditions, remember Samurai. when you loss, you either kill you self to honor to your family or let' the enemy kill you same as Korea..