|Unit||Index 2015=100, NSA|
|Adjustments||Not Seasonally Adjusted|
For Japan, the Corporate Goods Price Index (CGPI) measures the price developments of goods traded within the corporate sector. Its purposes are: to grasp supply-demand trends in goods, to assess economic developments and monetary policy; a deflator; a reference index for price-setting activities in the corporate sector.
There are three "Basic Grouping" indexes (Producer Price Index (PPI), Export Price Index (EPI), Import Price Index (IPI)) in which commodities are classified based on the Japan Standard Industrial Classification (JSIC) or partly the attributes of products. There are five "Reference" indexes (by stage of demand and use, PPI using chain-weighted index formula, PPI excluding consumption tax, prewar-base index, and passenger cars).
The PPI generally corresponds to the global standard as for it covers domestically-produced and domestically-traded goods in the corporate sector, and is compiled in principle, by surveying prices at the time of shipment in the producer stage.
The Bank of Japan (BOJ) conducts the survey. In the 2015 base, the PPI is classified into five major groups and further classified into 23 groups. It is compiled including the consumption tax.
In addition, indexes excluding extra charges for summer electricity, which adjust extra charges applied during summer season from July to September, are compiled as reference. The price levels of these indexes correspond to those of the Basic Grouping indexes during the normal charge period from October to June.
The stage and timing of price collection of goods for the EPI and IPI are at the time cargo is loaded/unloaded in Japan at the customs clearance stage, respectively. In the 2015 base, the EPI and IPI are classified into seven groups and 10 groups, respectively and they are compiled using prices without the consumption tax. The export and import values of 2015 in the Trade Statistics of Japan by Ministry of Finance are used for their weight calculation.
These indexes are compiled in two ways, a yen basis and a contract currency basis.
For indexes based on contract currencies, sample prices denominated in contract currencies are used directly. Conversely, for the yen basis, sample prices contracted in foreign currencies are converted into prices in yen, using telegraphic transfer spot exchange rates (monthly average, middle rate).
We have back-extended headline series.
At the source:
At IMF (e-GDDS):