This indicator measures prices for goods purchased by Japanese corporations. Calculated as a weighted average of three components: domestic wholesale prices, export wholesale prices and import wholesale prices. The index's base year is the year 2000. The index is designed for a more accurate calculation of the price index by taking into account the structural changes in the Japanese economy. A rising trend has a positive impact on the national currency, because when trade companies pay more for goods, they are likely to reflect higher costs to consumers.