The Grudge is an American horror film series released by Sony Pictures, based on, and a part of the larger Japanese Ju-On franchise. The first installment is a remake of Ju-On: The Grudge and follows a similar storyline to the Japanese film. The sequel, The Grudge 2, is not a remake and follows a unique storyline, albeit still borrowing some plot elements from several Japanese predecessors. The most recent sequel, The Grudge 3, picks up shortly after the events of the second film.
The series focuses on those affected by a curse created in a house in Suginami by a deceased family's rage that destroys the lives of everyone who comes in contact with it. Known as "the ju-on", this curse causes its victims to become fatally afflicted with it, which in turn leads to a new curse being born and passed like a virus to all those who enter the family residence or come into contact with the curse in any way.
On March 20, 2014, it was announced that a reboot was in the works, to be released in 2020. Sam Raimi and Robert Tapert served as producers for the first two installments and the reboot, through their Ghost House Pictures production company, with Takashige Ichise also serving as a producer on all four films.