This is the second part of this sonatina. I wonder if in ancient times, there was music made first with pentatonic scales.
So this piece uses the In Sen scale in D which is D - Eb - G - A - Bb. .... This is in the right hand all the time (except in two or three phrases where it is harmonized by thirds or sixths and the scale is enriched with other parallel In Sen scale.
In the left hand I harmonized freely.
Hope somebody enjoys it.