Concrete

is a 2004 independently produced Japanese film that is based on the case of the murder of Junko Furuta. The film deals as much with the social factors that produced Furuta's four assailants as it does with Furuta's suffering at their hands. The film involves four boys who kidnap a girl named Misaki. The boys rape, torture, and murder her in a similar manner to the manner of the boys who killed Junko Furuta. Many people protested the film's release before it even premiered, and it was eventually relegated to specialty theater showings and a DVD release. Plot Tatsuo Oosugi, a troubled working class teenager who frequently assaults his mother for divorcing his father and neglecting him, decides to join the yakuza to raise money for his future marriage with Kayoko Matsuyama after suffering burnout from his various low-paying jobs. Despite initially wanting to leave, he is given the opportunity to start a small gang called the Ryujin gang. He then recruits many of his friends to commit crimes like robbery and eventually, rape to please his seniors.