Konkurîto

Hey guess what? I've found a movie based on Junko Furuta's real life story.

Based on Jôji Atsumi's non-fiction novel Jûnana-sai: aku no rirekisho - the tagline for the movie, "Seventeen, Evil Resume" ("resume" = résumé), was a translation of the book's title - Concrete (Konkurîto) tells the real-life story of how, in 1989, a group of male youths in Tokyo, ranging in age from 16 to 18, abducted a 17-year-old high school girl, raped and otherwise abused her for 41 days, then murdered her. They put her corpse into a 50-gallon oil drum, filled the drum with concrete - hence the movie's title - then dumped it in a reclaimed land area.

Katsuya Matsumura's 1995 movie Concrete-Encased High School Girl Murder Case (Joshikôsei konkurîto-zume satsujin-jiken) [viewer discretion is advised] was based on the same murder case as Concrete. - -  Twitch

I've downloaded it. Can't wait to watch..Urghhh..Scary Mary...