Review: Mitsifuji



  • hand sewn 8” trace has a resistance of 7 ohms
  • machine sewn top thread 8” trace has a resistance of 13 ohms
  • machine sewn bottom thread 8” trace has a resistance of 7 ohms


  • easy to thread a size 24 crewel needle
  • does not fray or whisker
  • easy to sew by hand as well as machine
  • thread is wound on an industrial spool and has to be rewound on a bobbin for machine sewing

Mitsifuji thread is highly conductive, small diameter, and does not fray. This thread is HIGHLY RECOMMENDED for both hand sewing and machine sewing eTextiles, soft circuit, craft-tech, or wearable computing. This is my favorite conductive thread!

As of 2011 Mitsifuji thread is no longer manufactured.

Hand sewn LED circuit on cotton broad cloth with felt backing.
Positive and negative traces are 8 inches long.
Mitsifuji Conductive Thread Comparisons
Threads a crewel needle size 24 easily.
Jonh James Chenille Hand Sewing Needle Size 24
Hand sews a basic running stitch with few tangles or difficulties.
Conductive Thread Comparisons
1.8mm blue LED with 4 tight loops around the LED leads.
Conductive Thread Comparisons
Use a fresh 3V CR2032 battery to power the circuit.
LED glows = empirical evidence that the thread is conductive
Mitsifuji Conductive Thread Comparisons
Machine Stitching with a Schmetz Embroidery Needle 90/14
Schmetez Embroidery Needle for Berninia Home Sewing Machine
Machine stitching sample
top trace is Mitsifuji thread as top thread
bottom trace is Mitsifuji thread as bobbin thread
both methods sew smoothly without snags or fraying
Conductive Thread Comparisons

The reverse side of the machine sewing sample
Mitsifuji Conductive Thread Sewing Machine Sample Top Thread and Bobbin Thread