In April, the family of a 3-year-old male inmate who died of myocardial infarction and multiple organ failure while serving time in Nagoya Prison filed a lawsuit in the Tokyo District Court. The family is seeking compensation of more than 71 million yen from the government.

After the man's death, the prison decided to save the surveillance camera footage of the man in a solitary room in the facility on a recording medium, but at that time, it was found that the staff made a mistake and saved the footage of another person.