This is an indigo-dyed cotton Zanshi-ori fragment. 
 
Zanshi means “leftover thread” in Japanese, and each is a thread left over after being used to weave a kimono.  
 
Since the textile is woven with these leftover threads, it has an accidental pattern and is beautiful.
 
The stain, damage, and discoloration used for a long time are very cool.
 
Measures: 89cm(35") × 34cm(13")