"Noroi: The Curse" is a Japanese found-footage horror film directed by Kōji Shiraishi. While the film presents itself as a documentary and incorporates various elements of Japanese folklore and supernatural themes, it is not based on a true story. The narrative, involving a cursed entity and paranormal investigations, is fictional. However, it effectively uses realistic techniques and cultural references to create a believable and immersive experience, contributing to its reputation as a notable film in the horror genre.

While "Noroi: The Curse" is often cited as one of the scariest films due to its found-footage style and unsettling atmosphere, opinions on the scariest movie ever can vary widely. Many consider "The Exorcist" (1973) to hold that title due to its intense themes of possession and psychological horror. However, personal fears and cultural contexts play a significant role in such rankings, so the "scariest movie" can differ from person to person. Ultimately, it's subjective and varies with individual experiences and tastes in horror.

"Noroi: The Curse" is a found-footage horror film that is often considered genuinely unsettling and effective in its scares. The film employs a slow-burn approach, gradually building tension through its documentary style and the unfolding mystery surrounding the curse. Its use of realistic elements, eerie sound design, and atmospheric storytelling contribute to a pervasive sense of dread. While individual reactions to fear can vary, many viewers find "Noroi" to be one of the more frightening entries in the horror genre, particularly due to its unsettling themes and imagery.

In "Noroi: The Curse," the demon is known as "Kagutaba." This malevolent entity is central to the film's plot, which revolves around a documentary filmmaker investigating a series of mysterious events and deaths linked to an ancient curse. Kagutaba is depicted as a powerful spirit associated with a ritual involving a cursed child and the worship of a deity. The film explores themes of ancient folklore, the supernatural, and the consequences of disturbing dark forces, leading to a chilling and unsettling conclusion.