Trailer for Nobody Knows by Kore-Eda Hirozaku. Four siblings live happily with their mother in a small apartment in Tokyo. In fact, the children all have different fathers and have never been to school. The very existence of three of them has been hidden from the landlord. One day, the mother leaves behind a little money and a note, charging her oldest boy to look after the others. And so begins the childrens odyssey, a journey nobody knows.