Spin-off film in Kōji Shiraishi's "Senritsu Kaiki File Kowasugi" series. Made in 2014 and broadcast on NicoNico in 2015.
| Actor | Role |
|---|---|
 Elly NanamiSadako (archive footage) | Sadako (archive footage) |
 Runa EndoKayako (archive footage) | Kayako (archive footage) |
 Rintaro ShibamotoToshio (archive footage) | Toshio (archive footage) |
 Chika KuboyamaMiho Ichikawa | Miho Ichikawa |
 Hatsune MatsushimaHatsune Matsushima | Hatsune Matsushima |
 Koji ShiraishiMasatsugu Tashiro | Masatsugu Tashiro |
 Shigeo ÔsakoJin Kudo | Jin Kudo |