- Takashi Tsukamoto (Battle Royale) as Yusuke Ishida, a man who gets involved in the incident alongside Mayu
- Hiroya Shimizu (Chihayafuru) as Kazuma, a YouTuber and Mayu's younger brother who is cursed by Sadako
- Rie Tomosaka (Kindaichi Case Files) as Hatsuko Sofue, the mother of an amnesiac girl
- Renn Kiriyama (Kamen Rider W) as Minoru Fujii, Mayu's colleage and fellow psychiatrist
- Himeka Himejima as Mayu's patient who has lost her memory and is currently hospitalized
Directed by long-time The Ring franchise director Hideo Nakata, Sadako is set for a May 24th release in Japan.
[Source: Anime News Network]