"Ju-on" is a Japanese horror film series created by director Takashi Shimizu. The first film, released in 2000, introduces a cursed house in Tokyo where a violent murder occurred. This curse manifests as a vengeful spirit, haunting anyone who enters the house. The series is known for its non-linear storytelling and chilling atmosphere, which has made it a significant part of the horror genre. The franchise has expanded to include several sequels, remakes, and spin-offs, both in Japan and internationally. Notably, the American remake titled "The Grudge" was released in 2004, further popularizing the Ju-on concept. The films explore themes of grief, trauma, and the consequences of violence, leaving a lasting impact on audiences.