I really loved this one, it's one of my top favourites in the contest and another reminder that I should definitely watch this series sometime.
The visuals are stunning. The composition especially, the colour work, the subtle effects and even the texture all complement each other nicely and create this ambient and melancholic atmosphere. Then the action kicks in for some sections as a nice breather and fresher change of scenery before it goes back to the lovely ambient mood again.
Also I simply adore the mask/cutter beat sync you had going on.
And I actually disagree with the others about the hard cuts being too violent. The feel of the song does call for softer more smoother transitions but I liked the combinations of soft short fades and hard cuts because the cuts felt sharp and brought out emphasis in those scenes. It also helps break up the video a little so it doesn't feel like it's dragging on and on as one long piece.
I'm not sure I got your full story in this, since it is a little fragmented but I think the underlying concept you wanted to show with Casshern's emotional journey really shone through. I think I managed to get a good feel of his fear, his guilt, his stress, his anger,his regret and generally his pain and struggles at...this journey thing.
The only thing I didn't like was the twitch at the end. Felt somewhat random, unnecessary and a little lackluster.
But that's a really minor issue with the video so it doesn't really detract much from it's overall reviewability. Generally I was very impressed the first time I saw this and the more I watch it, the more I love it. I've already rewatched it at least 10 times while writing this er..short comment. xD Seriously, awesome job with this!
It's simply fantastic and I just love it.