The East Japan Railway Company is a major passenger railway company in Japan and is the biggest of the seven Japan Railways Group companies. The company name is officially shortened as JR-EAST or JR East in English, and as JR Higashi-Nihon (JR東日本, Jeiāru 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 (Before it had secondary listings in the Nagoya and Osaka stock exchanges), is a constituent of the TOPIX Core30 index, and is also one of the three only Japan Railways Group constituents of the Nikkei 225 index, the other ones are JR Central and JR West.