Siren (American title), known as Forbidden Siren all over the world, and with its original title in Japanese SAIREN, is a film based on a 2003 video game of the same name, Siren. The film was released in Japan on February 11, 2006 to coincide with the date of the release of the sequel to the first game in the country, Siren 2 (launched two days earlier, on February 9,), on which the film also relied.