is a superhero and kaiju film released in Japan on September 16, 2006, serving as a threatical tie-in to the Ultraman Mebius series. It is the 10th original film in the Ultraman franchise, and celebrates the 40th anniversary of the franchise. The film peaked at 3rd in the Japanese box offices.

Plot

The film begins 20 years ago, on the moon, with four of the Ultra brothers, Ultraman, Ultraseven, Ultraman Jack, and Ultraman Ace locked in battle with the Ultimate Terrible-Monster, U-Killersaurus, created and controlled by Yapool. They manage to injure and weaken the beast and send it falling to the Earth, where it crashes and sinks in the sea of Kobe. As the Ultra Brothers approach the area, Yapool manifests before them in an astral form and vows that he and U-Killersaurus will recover and rise again. The Ultra brothers decide to seal Yapool and U-Killersaurus in the ocean, but this action depletes their energy and renders them unable to transform. Stranded on their human hosts and forms, the Ultra brothers take jobs to be in the area of Kobe should Yapool ever return.