The pan flute starting the song is just beautiful and the ambient bass line was very pleasing on the air. Like how the uprising noise heard for a moment reminded me of a wolf howling at the moon as well. Shanath's vocals are very beautiful to listen to as well. This sounds like music that would play at the start of the game.
The older styled drums are beyond beautiful for the song and sound like they are being played by an actual orchestra. The bass line I hear gives off a nice ambient feel as if traversing the world of Okami. As for the xylophone, with each note it gives me that feel of drifting off into a dream of fun and wonder and a journey too.
Shanath's vocals sound like that of a professional singer which I have to admire quite a bit. Bouy's guitar playing seems to add the sensation of just wanting to run everywhere and see the world and what it has to hold and be discovered.
Overall, this is an incredibly beautiful collaboration!