Finally got round to completing the set of 5 coasters after choosing the backing fabric. Although the Sashiko coaster kit just require you to sew up the sides without any batting or backing, I chose to add on a lightweight iron on interface and a backing fabric.
I chose a dark Japanese print Kaufman fabric (almost black) with Kanji prints on it. I feel that it brings out the Japanese-ness of the Sashiko stitching.
I’m looking forward to completing the rest of the Sashiko kits!