Japan is known for having extreme work schedules, an extremely strange sense of humor that's a bit out of sync with their (seemingly) reserved personalities, and they're known for going to extremes to blow off steam. Behind closed doors, of course.
Training to become a "Salaryman" begins at an early age, so as you can imagine going to school in Japan is quite different than it is in America.
If you feel the American educational system is sorely lacking then you won’t be surprised to discover that the Japanese have us beat in many ways, but that intense schooling comes at a price.
Japanese students don't have substitute teachers to harass, they don't have janitors to clean up their messes, and they don't get Saturdays off to play with their pals. Where's the fun in that?