This Japanese Vest is made out of 4 rectangles of fabric surrounded by a crochet ending. You can easily modify the pattern to adapt the shape while you are adding the crochet part. To transition from fabric to crochet I have used a yarn needle and sew a blanket stitch all around.
It is up to you if you want to use leftover fabric or just buy a new one. In this case, the total needed will depend on the width of the fabric and how you want the print design to show. (i.e for size S and a 120 cm (48”) width fabric, you may only need 25 cm (10”)
Before cutting the fabric, think about how you would like to see the print design once the vest is finished. You will be able to decide at the end what goes up-down and right-left, but sometimes complex motifs may need planning ahead.
I recommend to customize the size of the mid-front crochet rectangles and the seams once you have finished the shoulders. The pictures may give you an idea, but it will very much depend on your size and preferences.
The Japanese Vest pattern is already available in Ravelry
In addition, you can also find some more inspirations about “fusion crafts” projects in my Pinterest Board: Inspiration- fusion crafts.