Sendai, Japan

Sendai, Japan: Submarine Cable Landing Point

Sendai is the capital of Miyagi Prefecture and the largest city in the Tōhoku region of Japan. Situated along Japan's Pacific coastline, it serves as a submarine cable landing point, connecting it to the broader domestic and international cable network that reaches across Japan's 68 landing points. One submarine cable lands at Sendai, linking the city into Japan's intra-national submarine cable infrastructure.

The single cable landing at Sendai, the Japan Information Highway (JIH), is a domestic system connecting multiple points within Japan. This positions Sendai as a contributor to the intra-Japan cable corridor, enabling connectivity between different parts of the country via undersea infrastructure rather than solely through terrestrial networks.

Cables Landing at Sendai

The Japan Information Highway (JIH) is the sole submarine cable landing at Sendai. The cable has a total length of 5,150 km and reached ready-for-service (RFS) status in 1999. All endpoints of the JIH are located within Japan, making it a purely domestic submarine cable system. With a route length of 5,150 km, the JIH is one of the longer domestic cable systems in the country, connecting multiple Japanese landing points via a substantial undersea route along and around the Japanese archipelago.

Regional Context

Within Japan's submarine cable landscape, Sendai hosts one cable, placing it among the smaller landing points in a country that spans 68 landing points and 51 submarine cables in total. By comparison, regional peers such as Shima (12 cables), Maruyama (9 cables), and Chikura (8 cables) host significantly more systems, while Hachijo, Minamiboso, and Naha each host four cables. Sendai's single-cable profile places it in the lower tier of Japanese landing points by cable count, ranking within the top 68 percent of the country's 68 landing points.

Network Role

Sendai functions as a single-cable terminus rather than a multi-cable hub. Its connection through the Japan Information Highway links it into a domestic submarine cable corridor that runs entirely within Japan, contributing to the intra-national submarine network that complements terrestrial connections across the archipelago. The JIH's 5,150 km length underscores the geographic scale of the domestic route it supports, reaching across a significant stretch of Japanese coastal waters.

In the broader Japanese submarine cable graph, Sendai represents one of many distributed domestic landing points that collectively extend submarine connectivity beyond the major international hubs concentrated at locations such as Shima, Maruyama, and Chikura, ensuring that regions like Tōhoku maintain direct participation in the country's undersea network.