Japanese engineers have established a new world record for internet speed, reaching 1.02 petabytes per second. More than one million gigabytes of data traveled 1,909 kilometers (1,186 miles) in a single second. The precise data transfer rate measured 1,020 million megabytes per second (Mbps), downloading 50,200 gigabytes in less than the blink of an eye. At this speed, one could theoretically download the entire Netflix library in just one second.
The achieved speeds remain in laboratory testing phases and have not been implemented in consumer internet services. Researchers express optimism that the technology will eventually meet growing global demand for high-speed internet, particularly as more people use data-intensive applications such as streaming, cloud storage, and artificial intelligence.
Japanese Prime Minister Shigeru Ishiba holds a press conference after the G7 Leaders’ Summit, in Calgary, Alberta, Canada, June 17, 2025 (Photo: Reuters/Todd Korol) REUTERS
The breakthrough was made possible through a 19-core optical fiber system, described as a “19-lane highway” for data transmission. The cable enables multiple parallel data streams, increasing transmission capacity without requiring thicker cables.
Such speeds could connect data centers across continents as if they were on the same local network, providing the necessary infrastructure for cloud computing, artificial intelligence, streaming, and next-generation applications. The technology could also serve future networks such as 6G, massive data centers, automated industrial environments, and demanding artificial intelligence services.
While consumers are unlikely to experience these speeds in their homes soon, the achievement could serve as a model for next-generation national infrastructures and submarine cables.