Kozo is a type of mulberry tree native to East Asia, particularly found in Japan and China. It is known for its strong and flexible bark, which is harvested to make traditional paper called washi. The tree can grow up to 10 meters tall and thrives in various soil types, making it a versatile plant for paper production. The bark of the kozo tree is stripped and processed to create a fibrous material that is lightweight yet durable. This unique quality makes washi paper ideal for various applications, including art, calligraphy, and crafts. The sustainable harvesting of kozo contributes to the preservation of traditional paper-making techniques.