In July 2025, Japan’s National Institute of Information and Communications Technology (NICT), set a new world record for data transfer speed: 1.02 petabit per second (Pbps).
This is enough to download the entire Netflix library or the English Wikipedia (about 100 GB) thousands of times in one second. To put this into perspective, it is 16 million times faster than the average internet speed in India (~63.55 Mbps).
How it was Achieved?
The experiment was conducted in laboratory conditions using a standard 0.125mm diameter fiber optic cable with 19 cores. The signal traveled 19 cycles along a 86.1km long cable, the total path was 1808km with the transmission of 180 independent data streams.
The obtained values were 1.86 exabit*sec/km (equivalent speed over distance), which is a new world record.
In doing so, the NICT emphasised that the technology was tested without replacing existing cables, demonstrating the advancement of existing infrastructure to support ultra-high speeds in collaboration with Sumitomo Electric and European researchers.
What Does this Mean?
Yet what does this tech development mean for the industry, artifical intelligence, and the end user otherwise you or I?
- For Industry and Data Centres: this record opens up the possibility of creating ultra-fast backbone, transcontinental lines, and 6G infrastructure.
- For the Cloud and AI: instant exchange of huge amounts of data, critical for AI, cloud computing and autonomous systems.
- For End Users: we are not talking about home access yet, but the experiment shows the limits of technological progress and the direction the internet will develop.
Limitations of the Testing
However, this is a laboratory test and not a commercial connection. The path from record to practice is long whilst new amplifiers, transmitters, and the adaptation of network equipment for such speeds are needed if this development is to become mainstream.
At the same time, 1.02 Pbps is 1020000000 Mbit/s is 3.5 million times higher than the average in the USA (~290 Mbit/s at the beginning of 2025).
Japan’s breakthrough shows that there are realistic paths to a future of ultra-fast internet without replacing existing infrastructure.
The data collected is an important step toward developing next-generation networks, but turning lab technology into a commercial reality will take time and effort.
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