Black Rat (Japanese: クロネズミ, Hepburn: Kuronezumi) is a 2010 Japanese slasher film directed by Kenta Fukasaku. It stars Misaki Yonemura, Hiroya Matsumoto, and Rina Saito. The film's plot follows six high school students who receive mysterious messages asking them to meet in a classroom at midnight, after which they are targeted by a figure wearing a schoolgirl uniform and a rat mask.