In making this pattern puzzle I'd use a knit kimono block. If you don't yet have one you will find the relevant worksheet in the coming months. The pattern plan in the post is for the front and the back of this garment and over the next two days I will be posting the 'bones' of the pattern making. That is, all pattern pieces so you can see the manipulations to achieve all the detail in the style.
You'll find all the pattern making instructions on the website blog.