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Revision of Real Exports and Real Imports

March 26, 2008
Bank of Japan
Research and Statistics Department

Real Exports and Real Imports are updated and revised as follows. The figures have been retroactively revised from January 1975.

  1. (1) Exports/Imports deflators of Real Exports and Real Imports are revised every five years in accordance with the revision of the base year for the EPI/IPI. This revision is a transition to the 2005 base Export/Import deflators. For details, see "Explanation of Real Exports and Real Imports."
  2. (2) Seasonally-adjusted figures of Real Exports and Real Imports are revised every year following the annual revision for the previous calendar year's data in the Trade Statistics. The ARIMA specifications of the X-12-ARIMA model have not been changed: (112)(011) for Real Exports and (011)(011) for Real Imports.