sentences:  JR Musashi-Kosugi Station has two opposed side platforms serving the two tracks (Platform 1 and Platform 2) of the Nambu Line and one island platform serving the two tracks (Platform 3 and Platform 4) of the Yokosuka Line.The Shōnan-Shinjuku Line and "Narita Express" share the Yokosuka Line platforms.The two sections of the JR station are located separately and connected by a 400 m long passage.