Musashi-Kosugi Station is a pair of physically separated interchange passenger railway stations, a block from each other, located in Nakahara Ward of eastern Kawasaki, Kanagawa, Japan, operated by East Japan Railway Company and the private-sector railway operator Tokyu Corporation. Note that the term JR East Musashi-Kosugi Station is non-specific, the physical buildings of the Yokosuka and Nambu lines run by the same company are some 400 meters away, connected by a passageway.

Nakahara-ku (中原区) is one of the 7 wards of the city of Kawasaki in Kanagawa Prefecture, Japan. As of November 2014, the ward had an estimated population of 244,565 and a density of 16,637 persons per km². The total area was 14.70 km².