I've checked them all and they all sell yardage. In the case of Pinwheels they price it by the quarter-yard but the fabric is intended to be sold as yardage. I've actually purchased fabric from Pinwheels before. Thank you for the question; I've saved these URLs for my future reference, even though I still have a fair amount of Japanese taupes in my stash.
Would love to hear if anyone else has favorite online shops for Japanese fabrics both printed and woven.