The Tsurumi Line (Japanese: 鶴見線, romanized: Tsurumi-sen) is a group of 3 railway lines operated by East Japan Railway Company (JR East) in Kanagawa Prefecture, Japan.

Originally built to service the port and adjacent industrial area, the lines provide passenger services (especially for local workers) along a line between Tsurumi Station in Tsurumi-ku, Yokohama and Ōgimachi Station in Kawasaki-ku, Kawasaki, and 2 short branches with a total length of track to 9.7 km (6.0 mi).

A shuttle bus for Toshiba employees runs in a loop between Asano, Shin-Shibaura, and Umi-Shibaura stations on a schedule alternating with Tsurumi Line trains.

The Tsurumi Port Railway (鶴見臨港鉄道, Tsurumi Rinkō Tetsudō) opened the Bentembashi to Hama-Kawasaki line, including the branch to Okawa in 1926, and extended the mainline to Ogimachi in 1928.

[citation needed] The company was nationalised in 1943, and in 1948 the voltage was increased to 1,500 V DC.