The East Japan Railway Company is a major passenger railway company in Japan, the largest of the seven Japan Railways Group companies. The company name is officially abbreviated as JR-EAST or JR East in English, and as JR Higashi-Nihon in Japanese. The company's headquarters are in Yoyogi, Shibuya, Tokyo, next to Shinjuku Station. It is listed in the Tokyo Stock Exchange, is a constituent of the TOPIX Large70 index, and is one of three Japan Railways Group constituents of the Nikkei 225 index, the others being JR Central and JR West.

The Japan Railways Group, more commonly known as the JR Group or simply JR, is a group of railway companies in Japan that underwent division and privatization of the government-owned Japanese National Railways (JNR) on April 1, 1987. It consists of six passenger railway companies, one freight railway company, and two non-service companies. Most of the liability of the JNR was assumed by the JNR Settlement Corporation.