Japan Gigabit Network (JGN) is High Speed Advanced Testbed Network for Research and Development (R&D), which is operated by National Institute of Information and Communication Technology (NICT). JGN is promoted with cooperation among government, industry and academia, and also collaborated with communal and international networks.
On 1999, JGN started operation of domestic optical fiber network. From 2004, As JGN2, We added domestic and international access point, increased network bandwidth, stared IPv6 routing and installed optical switches. Moreover, From 2008, As JGN2plus, ''Service Platform Architecture Research Center''(SPARC) is operating testbed network which is providing various services for research and development of next generation network.