Ciena announced that Seren Juno Network Co., Ltd. and Seren Juno Network America Inc (Seren Juno) will deploy the JUNO cable system with Ciena’s GeoMesh Extreme, powered by WaveLogic 6 Extreme (WL6e), to support Japan’s digital hub ambitions.

Established in July 2022, Seren Juno is a joint venture of NTT Ltd. Japan Corporation, Mitsui & Co., Ltd., PC Landing Corp, and JA Mitsui Leasing, Ltd..  Seren Juno is a company incorporated in Japan and a special purpose vehicle for design, construction, sales and operations of the 11,700km trans-Pacific JUNO cable system, connecting Japan and the United States.

And Seren Juno has selected NEC as the turn-key supplier for the JUNO cable system, estimated to be completed at the end of 2024, supporting the delivery of high-capacity services across Asia Pacific.

JUNO Cable Route


Existing Japan-U.S. cables such as PC-1, Unity and Faster, are nearing capacity limits and there is a need to meet the growth of bandwidth-intensive applications associated with AI, cloud-based services, and streaming videos. Powered by WL6e, the JUNO cable, which is the largest trans-Pacific submarine cable system with a system capacity up to 360Tbps, will be ready to hit new service delivery targets as soon as it launches.

The JUNO cable will enjoy unprecedented fiber capacity and spectral efficiency with Ciena’s performance-optimized WL6e delivering ubiquitous 800Gb, 400Gb, and 100Gb services.

JUNO will also benefit from Ciena’s Navigator Network Control Suite, which provides operational efficiencies for the cable, simplifying and accelerating planning, provisioning, and assurance workflows. Additionally, Ciena Services will provide submarine-specific automation for installation, spectrum activation, and testing for time savings and improved spectrum optimization. Submarine Line Terminal Equipment technical support will also be provided to maintain the highest network reliability.