Tosa washi is a traditional Japanese paper made in the Tosa region, specifically in Kochi Prefecture. This paper is known for its durability and unique texture, which is achieved through a meticulous handcrafting process. The fibers used in Tosa washi are often derived from the kozo plant, a type of mulberry, which contributes to its strength and flexibility. The production of Tosa washi involves several steps, including harvesting, soaking, and beating the fibers. Artisans then form the paper by hand, using a mold and deckle. Tosa washi is often used for calligraphy, painting, and various crafts, showcasing its versatility and cultural significance in Japan.