The NIKKEI 225 increased 2731 points or 9.95% since the beginning of 2021, according to trading on a contract for difference (CFD) that tracks this benchmark index from Japan. Historically, the Japan NIKKEI 225 Stock Market Index reached an all time high of 38957.44 in December of 1989. The Nikkei 225 Stock Average Index is a major stock market index which tracks the performance of 225 top rated companies listed in the First Section of the Tokyo Stock Exchange. It is a price-weighted index. The Nikkei 225 has a base value of 176.21 as of May 16, 1949.