Production and release
On November 24, 2009, it was announced that two live-action Gantz films were in production, based on the manga series of the same name. The films star Kazunari Ninomiya and Kenichi Matsuyama in the roles of Kurono and Kato respectively, and were directed by Shinsuke Sato. Both films were released in 2011: the first, Gantz, in January; and the second, Gantz: Perfect Answer, in April. Computer-generated animation (CG) was done by Digital Frontier.
The first film, titled Gantz, was released in Japan on 29 January 2011. A special one-night screening took place in the United States on January 20, 2011, during which the film was simulcast to movie theaters in 46 states; with the film dubbed into English for the event. At the end of the special screening at the Mann's Chinese 6 Theater in Los Angeles, there was a discussion and live interview with both the male leads, as well as a teaser trailer for Gantz: Perfect Answer. The film premiered in the United Kingdom at the Sci-Fi-London Festival on April 26, 2011 at the Apollo Theatre in London. The film was not dubbed, instead it was shown with the original soundtrack and accompanying subtitles.
Both films, Gantz and Perfect Answer, were screened in San Diego, California, as part of Comic-con International at the Gaslamp 15 Theater on 22 and 23 July 2011.