Gross domestic product
Gross domestic product (GDP) is a monetary measure of the market value of all the final goods and services produced in a period of time, often annually 
GDP (nominal) per capita does not, however, reflect differences in the cost of living and the inflation rates of the countries; therefore using a basis of GDP per capita at purchasing power parity (PPP) is arguably more useful when comparing differences in living standards between nations.
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.