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. This page provides - Japan Stock Market (NIKKEI 225) - actual values, historical data, forecast, chart, statistics, economic calendar and news. Japan NIKKEI 225 Stock Market Index - actual data, historical chart and calendar of releases - was last updated on April of 2018.