Japan-US Submarine Cable System or Japan-US Cable Network (Japan-US CN, J-US ) is the first high capacity trans-pacific subsea cable system using DWDM technology of 10 Gbps per wavelength. Japan-US Submarine Cable System consists of four fiber pairs, each operating at 10 Gbps DWDM, with design capacity of 640 Gbit/s (4,096 STM-1's), the equivalent of 7,741,440 simultaneous voice calls, making it the largest capacity cable in the Pacific Region. Initially, the system operated at 80 Gbit/s (512 STM-1's) with two lit fiber pairs, expanding to 400 Gbps (2,560 STM-1's) in mid 2001 by lighting the two remaining fiber pairs each with 16 wavelengths at 10 Gbps per wavelength, further upgraded to 32x10 Gbps DWDM in 2008. In June 2012, Japan-US CN consortium selected Ciena to upgrade with 100G technology.

System Profile

Cable System:

  • Japan-US Cable Network, Japan-US CN, JUSCN or J-US

Cable Length:

  • 21,000 Km

Design Capacity:

Lit Capacity:

  • 1280 Gbps

Commencement of Service:

  • August, 2001

Investment Type:

  • Consortium

Initial Investment:

  • US$ 1.03 billion


33 consortium members from 11 countries and regions, including:

    • Kokusai Denshin Denwa (KDD)
    • NTT
    • Japan Telecom (Softbank)
    • AT&T
    • GTE INS
    • Level3
    • MCI Worldcom
    • Qwest
    • SBC Communications Inc.
    • Sprint Corp.
    • Teleglobe
    • Pacific Gateway Exchange
    • BT
    • Cable & Wirelss
    • KPN
    • Singtel
    • Telstra
    • Telecom Malaysia
    • VIATEL
    • VSNL
    • etc.

Landing Stations:

    • Kita Ibaraki, Ibaraki Prefecture, Japan, NTT
    • Maruyama, Chiba Prefecture, Japan, Softbank
    • Shima, Mie Prefecture, Japan, KDD
    • Point Arena, Manchester, Mendocino County, California, USA , AT&T
    • Morro Bay, San Luis Obispo County, California, USA, Worldcom (MCI International)
    • Mākaha, Oahu, Hawaii, USA, GTE