Does America have more freedoms than Japan?

In my economics class, my teacher was talking about push and pull factors. He talked about how people are fleeing out of Japan because of the recent disasters. He asked "What would cause the people of Japan to be pulled to America?" People mindlessly raised their hands and said "Freedom." That wasn't the answer he was looking for, but he didn't mind seeing why they said it, so he followed up asking "What kinds of freedoms?", and it was dead silent. Nobody knew how to back up the statement they had already made. It seems that Americans are programmed to believe that America has more freedoms than everyone else, and everyone in the world is just begging to come here. But maybe I'm wrong. So does America really have that many more freedoms than Japan? By the way, I am American.