From Wikipedia, the free encyclopedia. Boro (Japanese: ぼろ) are a class of Japanese textiles that have been mended or patched together. The term is derived from Japanese boroboro, meaning something tattered or repaired.
Cloth was a precious resource that represented huge amounts of labor, and even scraps had value. Even after mechanized mills were built near Osaka, the fabric produced there was too expensive for many people to afford, and they continued to weave their own yardage for clothing and household items. Cotton was particularly scarce in northern Japan, where it was too cold for it to grow.”
So peasants pieced and patched their indigo-dyed fabrics and saved every usable scrap of cotton for reuse in these boro items and garments. https://www.sewingmachinesplus.com/sewblog/authentic-japanese-boro-boro-mending-boro-inspired-patchwork/