However, the school was not so big at this time. Schools have such an old history.
In Japan, there seems to have been something like a school more than 1,300 years ago. However, since this is also a very long time ago, we don't know much about it. Then, in 701, a law called the Taiho Ritsuryo (law of the Taiho era) was created, which decreed that there should be various schools throughout the country. Thus, schools have a history of more than 1,300 years in Japan.
However, the school system as we know it today is surprisingly new. School is determined as 6 years of elementary school, 3 years of junior high school, 3 years of high school, and 4 years of college. This was decided about 80 years ago.