Musashi-Kosugi Station (武蔵小杉駅, Musashi-Kosugi-eki) 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 (JR East) 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.

The two sections of the JR station are located separately and connected by a 400 m long passage.

Since then, the station has functioned as a major transfer point for people residing in Kawasaki (along the Nambu Line) who commute to Tokyo.

The nearby Kōgyōtoshi Station (工業都市駅, Kōgyōtoshi-eki) on the Toyoko Line opened on 11 December 1939.

After the end of World War II, JGR became the Japanese National Railways (JNR).

On 27 November 1988, grade separation work removed the level crossings on Tachikawa-bound tracks, and by 27 December 1988, grade separation work removed the level crossings on Kawasaki-bound tracks.

[7] In fiscal 2019, the Tokyu Toyoko Line station was used by an average of 173,414 total passengers daily and the Meguro Line station was used by an average of 49,842 total passengers daily.

However, with skyscraper construction giving the area an urban feel and outsider influx, the new local nickname Kosugi has emerged.