As it is the case with every school system arounf the world, each country will have it's own history regarding schooling hours and regulation. In the U.S, for instance, each state determines it's own minimum hourly requirements for schools to implement, with 8 hours/day in 180 days being the national average. In Japan, there are 240 school days required by law, with minimum hours varying from 4:30 to 6 depending on the grade. It's important to notice that although japanese law is less strict than that of most american states, japanese students usually spend more time studying than american ones in such a way that the school days in Japan are, in fact, longer compared to America, and not shorter.
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