Millennium Series

In the terminology of daikaiju eiga the Millennium Era (Mireniamu Era, romaji for the Japanese approximation to "Millennium") refers not to the third millennium but to all daikaiju eiga made since 1999, beginning with Toho's Godzilla 2000, which was jump-started in response to the America Godzilla film. The most recent film of the era is Daiei's Gamera the Brave. The Millennium era closely follows the Heisei era, which began with Toho's 1984 film The Return of Godzilla and ended with Gamera 3: Awakening of Irys, the last Gamera film to be released by Toho in 1999.

Unlike the Heisei era and, to a lesser extent, the Shōwa era, the Godzilla films of this series do not fall within a single timeline. Godzilla: Tokyo SOS is a direct sequel to Godzilla Against Mechagodzilla, but otherwise the films are unrelated with one another and include only Shōwa era daikaiju eiga in their individual chronologies, often only the original 1954 Godzilla; and not all Millennium era movies even acknowledge the full course of events of that movie — for example, according to Godzilla vs. Megaguirus, Godzilla was not destroyed by the Oxygen Destroyer, but instead attacked Tokyo and retreated to the ocean, never to be seen again until 1966. Likewise, the first Gamera film of the Millennium era ignores the events in the Heisei era films, starting a new story. Other films that fit in this era include the Korean daikaiju films D-War and The Host, as well as the American film Cloverfield.