Gantz has previously been adapted into a TV anime in 2004, which is currently licensed and distributed by Funimation.
The original Gantz manga was serialized in Shueisha’s Weekly Young Jump magazine from 2000 – 2013.
A new preview video has revealed that voice actor Daisuke Ono will be playing lead character Masaru Kato in Gantz: O, an upcoming 3DCG theatrical film based on the “Osaka Arc” of Hiroya Oku’s violent science fiction / action seinen manga, Gantz.