Ama, Japan

Ama, Japan: Submarine Cable Landing Point

Ama is a submarine cable landing point located in Japan, contributing to the country's broader network of 51 submarine cables distributed across 68 landing points along its coastline. As an island nation, Japan relies on submarine cable infrastructure to maintain connectivity between its main islands and its more remote island territories, and Ama participates in that domestic inter-island framework. One submarine cable lands at Ama, linking it to other points within Japan.

The single cable serving Ama is the Okinawa Remote Islands system, a domestically oriented cable that connects Japanese landing points to one another. This places Ama within a corridor of intra-Japan connectivity rather than an intercontinental or trans-Pacific route. The cable's reach across Japanese territory reflects the practical requirement of extending reliable connectivity to island communities that cannot be served efficiently by overland infrastructure.

Cables Landing at Ama

The Okinawa Remote Islands cable is the sole submarine cable landing at Ama. It has a total length of 915 km and reached its ready-for-service (RFS) date in 2017, with a draft designation noted. All other endpoints on this cable are also located within Japan, making it a purely domestic system. The cable's relatively short length compared to Japan's national average cable length of 5,696 km is consistent with its role as a regional inter-island link rather than a long-distance international connection.

Regional Context

Within Japan's landscape of submarine cable landing points, Ama hosts a single cable, placing it among the smaller landing points in the country. By comparison, Shima serves 12 cables, Maruyama serves 9, and Chikura serves 8, while Hachijo, Minamiboso, and Naha each serve 4. Ama ranks in the top 68 percent of Japan's 68 landing points by cable count, reflecting that while it is not among the most heavily served locations, it is not atypical for landing points that serve specific island or regional connectivity needs.

Network Role

Ama functions as a single-cable terminus within Japan's domestic submarine cable graph. The Okinawa Remote Islands system it hosts is oriented entirely toward intra-Japan connectivity, enabling the extension of network access across the island geography that defines much of Japan's coastal topology. Rather than serving as a gateway to international cable corridors, Ama's role is specifically to anchor one end of a regionally scoped link that ties remote Japanese island communities into the broader national network.

In the wider map of Japan's submarine cable infrastructure, landing points like Ama demonstrate that domestic inter-island routes are as much a part of the national cable fabric as the high-capacity international systems that terminate at larger hubs. The presence of a dedicated 915 km domestic cable at Ama reflects the practical demands of serving Japan's dispersed island geography.