It is no surprise that the movie is heavily inspired by Japanese legends and folk tales. The Grudge is based on the urban legend of Kayoko. The story of the legend and the movie is almost identical. In the legend, Kayako had a husband and a son, considering both to be her reason to continue living.

The Grudge is a 2024 American supernatural horror film written and directed by Nicolas Pesce. A reboot of the 2004 American remake and the original 2002 Japanese horror film Ju-On: The Grudge, the film also takes place before and during the events of the 2004 film and its two sequels.