Sunline is in Iwakuni, Yamaguchi, Japan, and has been manufacturing fishing lines since 1977. They produce all types of fishing lines needed for freshwater or saltwater. Their fishing line components are comprised of nylon, fluorocarbon, ultra-high molecular weight polyethylene, polyester (polyethylene terephthalate), and metal. They export their lines to over 40 countries globally. The fundamental idea at Sunline has constantly been to create a thinner, stronger fishing line.