NEC to Build a Next-Generation Link Between Japan and the U.S.
NEC Corporation will build the new trans-Pacific subsea cable JUNO, connecting California, USA, to two landing sites in Japan. The 10,000-kilometer system will strengthen data connectivity between Asia and North America.
The project will be developed by Seren Juno Network Co. (Seren)—a joint venture between NTT Ltd. Japan Corporation, Mitsui & Co., Ltd., PC Landing Corp., and JA Mitsui Leasing, Ltd.. The cable will land in Chiba Prefecture, east of Tokyo, and Mie Prefecture in Japan’s Kansai region.
Advanced Technology Delivers Record 350 Tbps Speed
Traditional subsea cables usually include 16 fiber pairs. However, JUNO will use NEC’s energy-efficient repeaters and Space Division Multiplexing (SDM) technology to support up to 20 fiber pairs for the first time on a trans-Pacific route.
This advancement will deliver an impressive 350 Tbps of total capacity—the highest among any cable linking the U.S. and Japan. As a result, JUNO will enable faster transfers, lower latency, and more reliable cloud connectivity.
Boosting Global Internet Demand and Cloud Growth
The world’s digital economy continues to grow rapidly, and demand for high-speed cloud connections keeps rising. Therefore, JUNO will play a key role in expanding global internet infrastructure.
“The undersea internet cable sector is becoming essential for global connectivity,” noted Takanobu Maeda, President and CEO of NTT Ltd. Japan Corporation. “This new cable reinforces our long-standing commitment to secure and efficient internet access worldwide.”
Strengthening Network Resilience and 5G Expansion
The cable’s dual landing points will make it more resilient to natural disasters along Japan’s coast. In addition, its dynamic bandwidth controls will let operators adjust capacity quickly as business needs change.
This flexibility supports 5G growth, higher data demands, and faster content delivery across Asia and North America. Ultimately, it ensures strong, reliable performance for both enterprises and cloud providers.
NEC’s Long History of Submarine Cable Expertise
For more than 50 years, NEC has supplied cutting-edge submarine networks. The company has already built over 300,000 kilometers of undersea cables worldwide.
Its subsidiary, OCC Corporation, produces optical cables that function in waters deeper than 8,000 meters. Moreover, NEC handles the entire process—from design and route surveys to installation, testing, and training—ensuring efficiency and long-term reliability.
