Japan Information Highway (JIH)

Japan Information Highway (JIH) is a domestic submarine cable network within Japan, connecting 9 coastal and island locations including Akita, Chikura, Ibaraki, Ishikari, Miyazaki, and 4 more. The system provides essential telecommunications infrastructure for communities that would otherwise depend entirely on satellite or microwave links. Japan's island geography makes it one of the most cable-dependent nations on Earth, with dozens of domestic submarine systems connecting its archipelago. Real-time monitoring by GeoCables compares current latency measurements from RIPE Atlas probes against baseline data to identify anomalies on this cable route.