The Japan-Guam-Australia (JGA) Cable System is a 9,500-kilometer undersea fiber optic cable system connecting Japan, Guam and Australia, with a design capacity of more than 36 terabits per second (Tbps) and is expected to be completed in the fourth quarter of 2019.

The JGA cable system comprises JGA South and JGA North, interconnecting at a new cable landing station in Piti, Guam.

JGA South and JGA North are operated as separate cable systems.

JGA South (JGA-S) is a consortium cable. JGA South consortium includes AARNet, Google and RTI-C. JGA South lands in Sydney, Sunshine Coast of Queensland and Piti in Guam, with an initial design capacity of 36 Tbps (2*180*100Gbps) on 2 fiber pairs. JGA South is the first new cable ever to land on the east coast of Australia, outside of Sydney.

JGA North (JGA-N), the 2600km segment between the Minami-Boso in Japan and Piti in Guam, is a private cable with RTI-C as the sole operator and investor. The JGA North cable consists of two fiber pairs, with an initial design capacity of 24 Tbps (2*120*100Gpbs).

The Minamiboso cable landing station for JGA North is a new cable landing station owned and controled by NTT, which is built as terminal station for NTT's Jupiter cable system. Minamiboso cable landing station will provide additional geographical diversity for U.S.-Japan traffic currently landing at KDDI's Chikura cable landing station and SoftBank's Maruyama cable landing station.

JGA South is supplied by Alcatel Submarine Networks (ASN), while JGA North is supplied by NEC Corporation.