I love this kind of music, but not these particular pieces.
I was raised with Japanese-minimalist-modern-classical music (....), so I'm very familiar with these types of compositions. I've seen these vids around, and I think that with western society (in reference to the entire media/music scene) and it's fascination with Japanese culture and whatnot, that this guy can get pretty far.
But when it comes to this kind of music, I kinda set my standard at composers like Takahashi, Takemitsu, Tokuyama etc... (wow, alot of T's!) And this also includes other east asian composers, like Tan Dun, Chen Yi, etc...