In Tonga "hiapo" is the name given to the paper mulberry tree. Gampi, mitsumata, and paper mulberry are three popular sources. However the highest quality of barkcloth was from paper mulberry. However, the highest quality of barkcloth was from paper mulberry. Paper mulberry was used among ancient Austronesians in making barkcloth. Paper mulberry is the most commonly used fiber in making Japanese paper.