There are many traditional techniques for the Japanese Shibori, but the particular technique that these Baisha clothes use is what is called Nui shibori. Nui shibori includes stitched shibori. A simple running stitch is used on the cloth then pulled tight to gather the cloth. The thread must be pulled very tight to work, and a wooden dowel must often be used to pull it tight enough. Each thread is secured by knotting before being dyed.
This technique allows for greater control of the pattern and greater variety of pattern, but it is much more time consuming.