Sadako Yamamura
With the help of Takayama's student, Mai Takano, Andō finds out more about Ryūji's past as well as the mysterious young woman, Sadako Yamamura. Searching for the truth about why Ryūji and Yōichi died from the virus while Reiko did not leads him to her boss Yoshino. Yoshino lets Andō in on a secret: he has the wife's diary. She and Ryūji had been researching the cursed videotape. While Reiko had broken the curse, Ryūji died a week after watching the tape. Reiko believed that creating a copy would break the curse, but Yōichi died a week after watching the tape, just as his father had. Yoshino shows Andō both the tape and the diary.