- In the Philippines, the movie poster carries the tagline "For the creators of The Ring and Juon: The Grudge 2." The two mentioned movies have no connection with this movie (except both movies also came from Japan where this movie was originated).
- During the opening credit sequence, one of the cell phone ring-tones is the theme song from an earlier 'Takashi Miike (I)' film, Gokudô kyôfu dai-gekijô: Gozu (2003).
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Trivia items below here contain information that may give away important plot points. You may not want to read any further if you've not already seen this title.
- SPOILER: The film has an alternate ending where after Yumi spits the candy into Yamashita's mouth, it cuts to Tendo, the exorcist, wearing casts on his arms and legs. He gets a missed call on his cell phone, but unlike the other victims, his message is from a few seconds in the future and not three days. He's then killed in a humorous fashion when a metal basin falls on his head.
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