On January 18, 2012, a mini workshop of kozo bark stripping was taken place at Tosa Washi Kogeimura (Arts and Crafts Village) in Ino Machi of Kochi Prefecture.
Kozo is the main fiber used to make washi; the bark that is used in 70% of washi made today. These kozo trees are cut down every winter to make the fibers and soon after, the plant will grow new buds, sprouting vibrant green leaves in the summertime, and will again be ready to harvest by next winter. This is one of the reasons that washi is considered to be eco-friendly.