sentences:  The eastern station is part of the Tokaido Line and contains JR East Yokosuka Line as well as Shinkansen tracks, though there is no stop.Although it is common to name stations after their operator, the term "JR East Musashi-Kosugi Station" is therefore non-specific as JR East services both complexes.Musashi-Kosugi Station is served by JR East's Nambu Line, Yokosuka Line, and Shōnan-Shinjuku Line, as well as Tokyu's Tōyoko Line and Meguro Line.