So-net, a Sony-owned ISP, has launched its “Nuro” service for Tokyo-area residents. It utilizes Japan’s GPON (Gigabit-capable Passive Optical Network) and provides speeds of 2 Gbps, which are the world’s fastest, at least doubling the speed of any comparable U.S. fiber-optic consumer connections.

The service costs just $50/month, which is remarkably low in comparison to either Google Fiber or Verizon FiOS that provide 1 Gbps and 150 Mbps for $79 and $129, respectively. This low price comes with two major caveats: a $540 installation fee, and a mandatory two-year contract that is presumably being used to fund further expansions to the company’s fiber-optic network.