The GDP Deflator measures the change in prices of final goods and services and it is considered as a key indicator for inflationary pressures, that provides insight into the future direction of monetary policy. This page provides the latest reported value for - Japan GDP Deflator - plus previous releases, historical high and low, short-term forecast and long-term prediction, economic calendar, survey consensus and news. Japan GDP Deflator - actual data, historical chart and calendar of releases - was last updated on April of 2018.