Nobody Knows
Director: Hirokazu Koreeda
It is a quite sad movie. But if you watch it you learn a lot about the dark side of Japan. Sometimes it's hard to believe that something like this actually can happen here, but if you live a bit longer in Japan you know it can be true.
The story is about four children, each a child by a different father, abandoned by their mother. They are then forced to survive on their own.