Japan-US (or Japan-US Cable Network – JUSCN or JUCN or J-US or JUS) is a submarine telecommunications cable system in the North Pacific Ocean linking the United States and Japan. It has landing points in: Shima, Mie Prefecture, Japan Maruyama, Chiba Prefecture, Japan Kitaibaraki, Ibaraki Prefecture, Japan Mākaha, Oahu, Hawaii, United States Point Arena, Manchester, Mendocino County, California, United States Morro Bay, San Luis Obispo, San Luis Obispo County, California, United States
It has a design transmission capacity of 640 Gbit/s, starting operation at 80 Gbit/s and a total cable length of 21,000 km. It started operation in August 2001. It was upgraded to be capable of 1.28 Tbit/s operation in March 2008.