There is something in Japan called Inemuri, that is when people falls asleep anywhere, for Japanese people Inemuri means you’re working hard, it’s very common to see this technique; when they’re in age of studying they spend all day and part of the night doing it, first at school and then taking extra courses, then they spend hours and hours working every day, some people work up to 20 hours a day wich is illegal and, for some of us, inhuman; people have died because of the excess of work in Japan, this is called Karoshi.