Reach North Asia Loop (RNAL) is a multi-terabit intra-Asia self-healing submarine telecommunications cable system, connecting the principal cities in Asia. The 10,000 km cable network provides intra-regional, city-to-city connectivity between Hong Kong, Seoul, Tokyo, and Taipei. The cable network was developed jointly by Reach and FLAG Telecom. Reach has constructed the eastern leg of the multi-terabit cable that connects Japan, Taiwan, and Hong Kong, while FLAG built the western leg connecting Japan, Hong Kong, and Korea.