Anukokunda Oka Roju (transl. Unexpectedly, one day) is a 2005 Indian Telugu-language mystery thriller film written and directed by Chandra Sekhar Yeleti. Produced by Gunnam Gangaraju and Venkat Dega under the Just Yellow banner, the film stars Charmy, Jagapathi Babu, and Shashank, with music composed by M. M. Keeravani.

The story follows Sahasra, a woman who experiences a missing day in her life and becomes involved in a dangerous situation as she attempts to uncover the truth behind it. The film explores themes of drug-induced memory loss, psychological manipulation, and the dangers of cults and godmen.

Anukokunda Oka Roju was critically acclaimed for its unique narrative, direction, and cast performances. The film won multiple accolades, including two Nandi Awards for Second Best Feature Film and Best Screenplay Writer, as well as a Filmfare Award South, and a Santosham Film Award. It was later remade as Sunday (2008) in Hindi.