We have Kimonos in our house as well. No ties to Japan, other than our daughter has an affinity. We stress appreciation over appropriation, so the Amazon kimono tat is OUT. I've managed to learn and hunt down some authentic gear, one complete kimono, and another about half complete.
All that to say, I can't help but think that a tartan Obi would be a better look, and presentation of tartan, in my opinion.