How quickly can the world’s fastest Internet connection download the entire Netflix library?

You’d have to go all the way to Japan to use it, but there’s an Internet connection so fast that it would take mere seconds to download everything available on Netflix. Researchers in the country have set a new world record for the fastest Internet speed, clocking in at 402 terabits per second. That’s 4 million times faster than average broadband speeds in the U.S.

The feat was achieved by a team led by the National Institute of Information and Communications Technology. They did it by using multiband wavelength division multiplexing and cutting-edge optical amplifiers to expand the bandwidth to 37.6 THz. The data was transmitted over 50 kilometers of fiber-optic cable.

The best part, though, is that they used commercially available fiber that didn’t require a bunch of specific upgrades. While some alterations would need to be made, this could be scaled for real-world connections without having to change out the whole network.