Katasumi, in particular, is notable for marking the first appearance of actress Takako Fuji (at this point anonymous) as Kayako Saeki, a role that she would reprise for every Ju-on production thereafter, up to The Grudge 2.
While it is often claimed that the subsequent feature length video films Ju-on: The Curse and Ju-on: The Curse 2 are remakes of Katasumi and 4444444444, the two segments "are actually the foundations of Ju-on", according to Shimizu, and act "almost like the true prequel of the story."
Kayako's ghost manifests with her long, black hair covering her face, much like she is portrayed in the Grudge film series. In the following Ju-on installments up until Ju-on: The Grudge 2, the ghost has bangs.