JUNO is a new submarine cable system connecting Japan and the United States. It is planned to land in Chiba prefecture and Mie prefecture, Japan, and California, the US, with a cable length of approximately 10,000km
The JUNO cable system will introduce leading-edge SDM (Space Division Multiplexing) technology, enabling the provision of 20 fiber pairs (40 cores) per cable. Conventional technology currently provides a maximum of 16 fiber pairs or 32 cores.
The JUNO cable system will provide a system capacity of 350Tbps, the largest among all of the existing trans-pacific cable systems, followed by Google's Topaz cable system of 240Tbps over 16 fiber pairs, and Hawaiki Nui of 240Tbps and PLCN of 144Tbps.
The JUNO cable system will be owned and operated privately by Seren Juno Network Co., Ltd. (“Seren”), a special purpose vehicle for design, construction, sales and operations of the JUNO trans-Pacific submarine cable system. Established in July 2022, Seren is a joint venture of NTT Ltd. Japan Corporation, Mitsui & Co., Ltd., PC Landing Corp, and JA Mitsui Leasing, Ltd..
NEC Corporation (NEC) announced on July 21, 2022 that it has been contracted by Seren Juno Network Co., Ltd. to build the JUNO Cable System.
The JUNO cable system is expected to be ready for service by the end of 2024.