Real gross domestic product
Real gross domestic product (real GDP for short) is a macroeconomic measure of the value of economic output adjusted for price changes (i.e. inflation or deflation). This adjustment transforms the money-value measure, nominal GDP, into an index for quantity of total output. Although GDP is total output, it is primarily useful because it closely approximates the total spending: the sum of consumer spending, investment made by industry, excess of exports over imports, and government spending. Due to inflation, GDP increases and does not actually reflect the true growth in an economy. That is why the GDP must be divided by the inflation rate (raised to the power of units of time in which the rate is measured) to get the growth of the real GDP. Different organizations use different types of 'Real GDP' measures, for example the United Nations UNCTAD uses 2005 Constant prices and exchange rates while the FRED uses 2009 constant prices and exchange rates, and recently the World Bank switched from 2005 to 2010 constant prices and exchange rates.
Economy of Japan
The economy of Japan is a highly developed and market-oriented economy. It is the third-largest in the world by nominal GDP and the fourth-largest by purchasing power parity (PPP). and is the world's second largest developed economy. Japan is a member of the G7. According to the International Monetary Fund, the country's per capita GDP (PPP) was at $38,937(2016). Due to a volatile currency exchange rate, Japan's GDP as measured in dollars fluctuates widely. Accounting for these fluctuations through use of the Atlas method, Japan is estimated to have a GDP per capita of around $38,490. The Japanese economy is forecasted by the Quarterly Tankan survey of business sentiment conducted by the Bank of Japan. The Nikkei 225 presents the monthly report of top Blue chip (stock market) equities on Japan Exchange Group.