J-Universities

I have an imege that the students in university are free in Japan. Almost students have a lot of free time. We can do a club activity, a part-time job, and what we want to do.
The students can enjoy our own free time, however, their behavior to classes is not good. Some sleep well, and the other talk with friends. To tell the truth, I sometimes sleep in class...
In foreign country, for example America and the UK are, it is harder to graduate from the university than to enter the university. On the other side, in Japan, it is harder to pass the entrance examination than to graduate from the university. I think it's the reason why Japanese students don't study so much.
I wrote that the students have a lot of free time, but I'm always busy. Why? I want to study more, but I can't do everything what I want. I try to do my best!!!!