The
Tokaido Main Line opened in 1872 and passed through Tamachi, which was at the time still submerged under
Tokyo Bay. The area to the west of the Tokaido Line was filled in to make a temporary stop with the same name in 1876. The stop was short-lived as it was abolished just a year later. Tamachi Station opened on December 16, 1909 as an intermediate station on the newly opened
Shinagawa-
Karasumori section of the Yamanote Line, then operated by
Japanese National Railways. It was the sixteenth stop to open on the Yamanote Line. The area surrounding the station was predominantly industrial until the 1970s, with several confectionery, electronics and machinery factories. New development shifted to commercial buildings beginning with the Morinaga Plaza Building in 1970. The west side of Tamachi underwent a major redevelopment from 1988, resulting in the current elevated deck and pedestrian bridge over the adjacent
Dai-Ichi Keihin road. ==Station layout==