is a 2004 Japanese drama film based on the 1988 Sugamo child abandonment case. The film is written, produced, and directed by Hirokazu Kore-eda, and it stars actors Yūya Yagira, Ayu Kitaura, Hiei Kimura. Nobody Knows tells the story of four children: Akira, Kyōko, Shigeru and Yuki, who are aged between five and twelve years old. They are half-siblings, with each of them having different fathers. Because the three youngest children are in the apartment illegally without the landlord's knowledge or permission, they cannot go outside or be seen in the apartment, and they do not attend school. Their mother leaves them alone for weeks, and finally does not return. Forced over time to survive on their own, they can only rely on each other to face the multiple challenges in front of them. Nobody Knows was first shown at the 2004 Cannes Film Festival on 12 May 2004. It was subsequently released in Japanese cinemas on 7 August 2004. The film was well received by critics, and it grossed over US$11 million worldwide. It won several awards, most notably Best Actor at the 2004 Cannes Film Festival as well as Best Film and Best Director awards at the 47th Blue Ribbon Awards. At the time Yūya Yagira became the youngest Best Actor winner in the history of the Cannes Film Festival. Plot A young mother and her four children move into a small apartment in Tokyo. Only the eldest, Akira, is known to the landlord; he and his mother Keiko smuggle the youngest boy and girl, Shigeru and Yuki, into the apartment inside suitcases. The elder sister, Kyōko, comes separately by train. Each of the children have different fathers. Their mother does not allow them to go to school or be seen by others, and only Akira is allowed to go outside. After a few months, Keiko tells Akira that she has a new boyfriend, and that after she gets married, the children can lead normal lives, but Akira seems doubtful. Without warning, Keiko leaves home and is away for months, leaving only a small amount of money for the children. Akira is forced to take charge of paying the rent and other expenses and caring for his younger siblings. When they run out of money, Akira goes to see several men who may be Yuki's biological father and asks them for money. At length, Keiko returns, bringing all