When I was there they went to school 6 days a week. They do take to technology, but also take to learning so they use the tech for fun and work.
Japanese kids go through a horrible academic life that includes cram school, pressure to fit into molds so they fit into corporate culture, which often determines who the can marry and what type of future they can have, which drives a high rate of kids to suicide.
Every culture has strengths and weaknesses in eduction. We should learn from each other. America has some of the best universities in the world, for instance.