Kotoko is a 2011 Japanese Psychological horror Drama film Written and directed by Shinya Tsukamoto. based on an original story by J-pop artist Cocco, who stars in the film alongside Tsukamoto.

Plot

A single mother, Kotoko (Cocco), struggles to care for her infant son, Daijiro, while suffering from double vision. This condition causes her to hallucinate terrifying doubles of people she meets. Kotoko regularly practices self-harm, due to a fascination with her body's will to live, and finds that her hallucinations only cease while she is singing.