The Sōtetsu–JR Direct Line is a section of the project, built by the Japan Railway Construction, Transport and Technology Agency (JRTT). It connects the Sōtetsu Main Line to the JR East Saikyō Line, via the tracks of the Sōtetsu Shin-Yokohama Line and the Tōkaidō Freight Line. This service is publicly referred to as a Sotetsu Direct Line by JR East, and as a JR Direct Line by the Sagami Railway.