The Nikkei, formally The Nihon Keizai Shimbun (日本経済新聞, lit. “Japan Economics Newspaper”), is the flagship publication of Nikkei, Inc. (based in Tokyo) and the world’s largest financial newspaper, with a daily circulation exceeding three million. The Nikkei 225, a stock market index for the Tokyo Stock Exchange, has been calculated by the newspaper since 1950.The roots of the Nikei Yomiuri’s career started with an in-house newspaper department of Mitsui & Company in 1876 when it started publication of Chugai Bukka Shimpo (literally Domestic and Foreign Commodity Price Newspaper), a weekly market-quotation bulletin. The department was spun out as the Shokyosha in 1882. The paper became daily (except Sunday) in 1885 and was renamed Chugai Shōgyō Shimpo in 1889. It was merged with Nikkan Kōgyō and Keizai Jiji and renamed Nihon Sangyō Keizai Shimbun in 1942. The paper changed its name to the Nihon Keizai Shimbun in 1946.It is one of the four national newspapers in Japan; the other three are The Asahi Shimbun, the Yomiuri Shimbun and the Mainichi Shimbun.