Article · Wikipedia archive · Last revised Jul 27, 2026

RJK

RJK (Russia-Japan-Korea) is a submarine telecommunications cable system linking Russia, Japan, and South Korea, all of which border the Sea of Japan. It began operation in January 1995. On Monday, August 16, 2010, Rostelecom announced a transfer of ownership of the undersea cable to the Russian Institute of Pacific Oceanology, with the intended use for research on geomagnetic fields and ceasing any telecommunication use on the line.

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Jul 27, 2026
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RJK (Russia-Japan-Korea) is a submarine telecommunications cable system linking Russia, Japan, and South Korea, all of which border the Sea of Japan.1 It began operation in January 1995. On Monday, August 16, 2010, Rostelecom (Russian telecommunications company) announced a transfer of ownership of the undersea cable to the Russian Institute of Pacific Oceanology, with the intended use for research on geomagnetic fields and ceasing any telecommunication use on the line.2

It has landing points in:13

It has a transmission capacity of 560 Mbps per fiber optic pair, totaling to 1.12 Gbps over both pairs. The total cable length is 1,715 km (1,066 mi).13

Since the transfer of ownership, the RJCN has arisen as the primary telecommunication cable between Russia and Japan. This new generation of subsea cable is rated for 1.28 Tbps data transfer (640 Gbps per pair), beginning service in 5 September 2008.24

References

References

  1. "RJK - Submarine Networks". www.submarinenetworks.com. Retrieved 2024-08-13.
  2. "RJK Subsea Cable is Transferred to Scientists - Submarine Networks". www.submarinenetworks.com. Retrieved 2024-08-13.
  3. "High-speed optical submarine cable networks at the speed of 80 Gbps are to be established around the Japanese archipelago"(PDF). Retrieved February 11, 2006
  4. "RJCN - Submarine Networks". www.submarinenetworks.com. Retrieved 2024-08-13.