Compared with western countries, Japan have developed a very hard competition system for aperson to obtain a good school career since late 19th century. Why?
First of all, because of the lack of serious class conflict, Japan did not de velop the class cultures which were very different each other. This class situation created the unified school system free from class cultures, and established a selective examination based only on an achievement test.
Secondly, the selection, which has no connection with social Origins, made the competition for a good school career very hard.