Shashiko translates as "little stabs". It's a reinforcement stitch meant to strengthen places of wear and tear on garments and textiles. It's traditionally seen as a running pattern using white thread on indigo cloth, but I see it used everywhere now, especially in multicolored Kantha cloths.
I have some mending to do on my son's denim jeans, all of which have blown out knees. I think I might try this stitch to shore up the rips.