Little bit treble heavy, but two hours? Nice freaking work. The beat is simple, but it works. I would take up the 808 up some, with the acapella. The shakuhachi and the hihats are a little bit in your face relative to the bass and acapella. 808 of course is what drives the genre. There's nothing in the range of that flute, so bringing it down won't push it all the way to the back.
I might add a light ping pong delay on 1/4 timing, at least for the last syllable of "now I got you 'fraid like uh-HUH" and throw that HUH out to one side or the other. A chorus might also do it well in places, for a silky feel.