I had a chance this weekend to try out a sample of the new Hidamari sashiko thread from Lecien Corp. of Japan. This cotton sashiko thread is very thin, It is made up of 6 stands of very fine, tightly spun threads. The thread comes wound on little cones about 3 inches high and an inch wide. Because of the tight twist on this thread, I don't think it will ever get fuzzy like the Olympus threads.
The first row shows the stitches using the thread just as it comes off the cone. The second row show the stitches with the thread doubled. I was able to pull the stitches out of the fabric back backing the needle out of the fabric. This was using a cotton-linen fabric which is more more of an open weave fabric. I haven't tested this on a more dense fabric like a Kona Cotton or Moda Marble.