Japanese traditional marrige is through "Omiai", which is a meeting of two people (most oftenly men and women) who want to get married. In the old days these selections were done by their parents, and it wasn't unusual for people to marry their father's recommended person. However, it changed as time went by (thank goodness). Nowadays people tend to marry to whom ever they like, and with "Love"(well, sometimes it happens that the other is marrying a person for money, but let's think not). "Omiai" is still happening in Japan, and now it tends to be that their friends or their colleagues pick the other person, not their parents.
In the case of divorce, Japanese people tend to choose not to. The divorce rate haasn't changed much since the end of the war. This may be a good thing. But I think this may come from the fact that Japanese people are dependant and passive. They can't live without a partner, and they can't say even if they wanted to divorce. Maybe, this can be the reason for low divorce rate.
