Good mentality with strong determination for success. Development of a good and standard "blue print" in their education sector. Following the dreams of their fore fathers to achieve a breakthrough in the sector. Adoption of a compulsory 9-year education system for the citizens. And that is why today Japanese people are known for their intelligence.
I'm not entirely sure what the question means, but if you are asking about the quality of the Japanese educational system, it's complex. Although it is generally good, there are real problems. For example, high schools are tracked by school; so there are clear college-prep schools and non-college-prep schools. One must take an exam to get into high school and this can determine one's future at a very early age. Also, there are problems of bullying in Japanese schools and there have been other issues related to kids in schools being disrespectful of teachers. On the other hand, there is a fairly equal distribution of the quality of education. Finally, this depends partly on what you mean by education. There have been major changes in the system of higher education in recent years, in part due to concerns over quality. The point here is that the Japanese system, like any other educational system, has both good and not so good points.