III. Great. Notational errors aside (which I would strongly recommend fixing) and a couple inconsistencies (i.e. why doesn't the first measure use the whole note like the rest of the piece), the ending was the only thing that threw me. While I do understand and like the effect of getting progressively emptier as time goes on, I think it might have been a little too abrupt with the truncation of the left hand motive. I'm not entirely sure.
IV. I like this one too. Kind of an interesting Japanese feeling with the use of the majority of the Insen scale (minus the minor 7th), but it works nicely here. Notational issues are kind of a thing and I would look into rest beaming or crossed staff notation to alleviate some of the difficult rest reading. The part with the trill at the bottom was the weakest for me. The attention to detail of the rhythm, which was arguably the most important thing in this particular piece, was a little bit lacking, relatively speaking. Overall, it was enjoyable.