Kuguri-sashi (Weave Under Threads Sashiko)
Kugurizashi Sashiko is a two step sashiko stitching style. First you stitch a hitomezashi (one stitch) sashiko design and then you weave under those stitches to create a kugurisashi sashiko design.
Although these designs look impressively complicated they break down into easy to do enjoyable stitching steps!