Dirty Hearts

 is a 2011 Japanese/Brazilian drama-thriller film directed by Vicente Amorim, based on the book of the same name by Fernando Morais. The film was premiered at Festival do Rio on October 13, 2011, and was released in Brazil on August 17, 2012.
The film is based upon the true story of Shindo Renmei, a terrorist organization composed of Japanese immigrants in Brazil, at the end of World War II.
Plot.
In 1945, news of the Surrender of Japan was received with wide skepticism by most Japanese immigrants in Brazil, who assumed it be mere Allied propaganda. Those who did accept the truth are seen as traitors, "dirty hearts", who dishonor the emperor; patriotic-turned-terrorist organization Shindo Renmei takes in their own hands the duty of killing said traitors.
The movie is told from the point of view of the wife of a Shindo Renmei member, who can't help but witness her husband lose himself in fanaticism and bloodshed.