Kasuri is a thread-resist textile in which the warp and/or weft threads are tied or compressed before dyeing so that when woven they form a pre-determined pattern
Kasuri is a often thought of as a cotton or hemp (asa) cloth that was especially popular in the late 19th and early 20th centuries and which is now associated with traditional rural Japan – particularly those which have white repeat patterns on indigo dyed woven cloth.
The word kasuri is probably derived from the name for thread-resist fabrics from the southern Ryukyuan island of Yeyama - kashiri- it also sounds like the words kasuru which means to blur and kasumi which refers to mist or haze. As kasuri patterns often have a blurred or hazy look these similar sounding words help describe the fabric!
Kasuri technically refers to thread-resist textiles in which warp and/or weft threads are partially tied, bound or compressed before they are dyed so that when they are woven they form a pre-determined pattern in the finished cloth, however, for the Japanese kasuri has a broader definition which includes textiles which are created using the same materials, patterns, colours and techniques.
This is only a brief introduction to kasuri textiles – helped by the information in the book Beyond the Tanabata Bridge: Traditional Japanese Textiles edited by William Rathburn which has a substantial chapter on kasuri.