Rather than a manga, this should more be looked at as an interview, and its a really boring one. The author talks about how Back to the Future inspired him to create Gantz, but honestly I have no idea what he's talking about. He mostly just rambles vaguely about Hollywood (I guess he's trying to say Gantz's scale was inspired by BTF?). Basically, he says nothing of value. Interviews are only interesting when you get to see a glimpse into the author's head, what makes them think the way they think. I don't feel like I know Gantz's author anybetter from this, except that he really likes big boobs (which is not a revelation, given Gantz's nudity).

5/10, do better.