Most repairs try to disappear. Sashiko does the opposite: it celebrates the mend. This traditional Japanese technique uses simple running stitches in geometric patterns to strengthen fabric, and it has become one of the most popular ways to mend denim by hand.
Where Sashiko comes from
Sashiko, roughly "little stabs", developed in rural Japan, where cloth was precious and garments were patched and layered over generations. Running stitches held layers together for warmth and strength. Over time, the stitching became decorative too, with traditional patterns like waves, grids and interlocking circles.
Why it suits denim
- Traditional Sashiko is often white thread on indigo cloth: the same colours as denim.
- Rows of running stitches spread stress over a wide area, which strengthens worn patches.
- All you need is a needle, thread and a scrap of fabric. No machine.
- Every mend is unique.
How to start
- Get the right kit: a long Sashiko needle, thick cotton Sashiko thread, and a thimble.
- Back the hole with a patch of denim or cotton on the inside, slightly larger than the worn area.
- Mark a grid with chalk, about 5mm apart.
- Stitch evenly, gathering several stitches onto the needle before pulling through. Aim for stitches slightly longer on top than underneath.
- Leave a little slack at the end of each row so the fabric can move.
Learn it in person
A class is the quickest way to get the rhythm. If you're near Cambridge, Repair My Denim runs hands-on Sashiko workshops at the Grand Arcade, with all materials included and beginners welcome.
Sashiko or invisible repair?
Sashiko is perfect for knees, thighs and jackets, where a visible mend looks great. For high-stress areas like the crotch, a machine repair is usually more practical. See why jeans rip at the crotch.