Spurred by the overwhelming success of Ringu リング (1998), six filmmakers – Masayuki Ochiai 落合正幸, Norio Tsuruta 鶴田 法男, Takashi Shimizu 清水 崇, Kiyoshi Kurosawa 黒沢 清, Hideo Nakata 中田 秀夫, Hiroshi Takahashi 高橋 洋 – were requested to create a horror film to be released under Ichise's J-Horror Theater anthology.
It was then released on DVD and in US theaters as part of the After Dark Horrorfest (also known as 8 films to Die For) in 2006.
Officially released as part of the J-Horror Theater series and is the final film instalment.
It holds significance as the film is directed and produced by the pair responsible for Ringu that began the J-Horror Theater anthology.
The official Kyōfu trailer also suggests that Kaidan and Sakebi were part of the series, as at the beginning it shows clips from all 5 films with their release dates, 2004–2007, followed by the Kyôfu preview.