What is junko furuta case?

Junko Furuta was a 16-year-old Japanese girl who was abducted by a gang of four boys in 1988. She was tortured, raped, and murdered for 44 days before being killed. Her captors were sentenced to varying degrees of imprisonment, but the sentences they received were considered too lenient by many, given the severity of the crime. The case has become infamous in Japan and around the world as an example of extreme human cruelty and the failings of the criminal justice system in dealing with such crimes.