'Nobody knows' (Dare mo Shiranai) is a Japanese film by Hirokazu Koreeda. It's about a single mother who moves into a small appartment. At first it seems she has only one child, but two more childs are hidden in suitcases, while another child has to picked up at the train station.
This mom leaves her children to chase her own happiness and her twelve year old son has to be responsible for her children. As you can guess, money is short and the children have to find a way living without gas, water and electricity.
It's based on a true story but this film is less miserable. The children seem okay, while in real they were poorly developed (they couldn't go to school).
This film is really great. It contains all things necessary. Though it's painfull to watch there are sweet warm and funny moments. Above all it is heartbreaking to watch, luckily it doesn't rely entirely on the tragic part of the story. Though in the end it will probably make you feel very depressed.
It lacks any action, but if you wanna try some great film which you have never seen before you just have to go to get this film!