This chart shows the real (inflation adjusted) Nikkei 225. The data in the chart is calculated by multiplying each data point in the Nikkei 225 - Monthly chart by the ratio of the last and corresponding data point in the Japan CPI - Monthly chart. A log scale is used to better illustrate the relative size of price changes.
mccormick-charts.com: Nikkei 225 - Monthly, Japan CPI - Monthly
Wikipedia: Nikkei 225