OFF-TOPIC: this thread had Zeekade and Lemonflav
ON-TOPIC: yeah, this movie was a flop in Japan too, for all of the above mentioned reasons. Too long, incomprehensible plot, and the slight whiff of pretension. Too bad, cause it's a gorgeous gorgeous film. The mute superhuman character was played by Hiroyuki Miyasako, one of my favorite comedians in one of his rare non-comedic roles.
IMO the director, Kazuaki Kiriya, does a much better job with his music videos. The videos he directed for Hikaru Utada's "Sakura Drops" and "Travelling" are just as gorgeous, with stunning visuals, but don't drag on like Casshern did.