Corporate Price Index (August)

This document is the Corporate Price Index (Preliminary August 2026) released by the Bank of Japan's Research and Statistics Department. It presents the preliminary August 2026 figures, month-on-month changes, and year-on-year changes for the Domestic Corporate Goods Price Index, Export Price Index, and Import Price Index, and also includes monthly trends from July 2025 through August 2026.

The indexes are displayed with the 2020 annual average set at 100, and rates of change are shown as percentages. For the Export Price Index and Import Price Index, contract-currency and yen bases are presented separately. For the Domestic Corporate Goods Price Index, a reference series adjusted for summer electricity charges is calculated by excluding from the overall average the effects of the summer electricity surcharge applied annually from July through September.

In addition to the overall averages of the three price indexes, the document presents contributions by category and item, item-level indexes, a chain-linked Domestic Corporate Goods Price Index, exchange rates, and time series for each index.

When downloading time-series data from the Bank of Japan website, users are directed to the Time-Series Statistics Search Site.

The release time is stated as 8:50 a.m., and the next Corporate Price Index release is scheduled for October 13 (Tuesday).

The overall average of the Domestic Corporate Goods Price Index was 136.1 in the August 2026 preliminary results, down 0.2% month on month and up 7.6% year on year. After adjustment for summer electricity charges, the index was 136.0, down 0.1% month on month and up 7.7% year on year. The main downward contributions to the month-on-month change were electricity, city gas, and water at 0.14%, agricultural, forestry, and fishery products at 0.12%, petroleum and coal products at 0.12%, and scrap at 0.04%. Upward contributions included nonferrous metals at 0.10%, foods and beverages at 0.04%, plastic products at 0.04%, and metal products at 0.02%.

The main items that declined in the Domestic Corporate Goods Price Index were city gas, electricity for business use, milled rice, pork, dried whitebait, B-grade heavy oil and C-grade heavy oil, jet fuel, lubricating oil, iron scrap, and copper and aluminum scrap. Items that rose included copper, aluminum-alloy die castings, gold bullion, frozen prepared foods, sweet buns, canned and bottled fishery products, and plastic films and sheets.

The overall average of the Export Price Index was 162.1 on a yen basis, down 0.7% month on month and up 11.1% year on year, while on a contract-currency basis it rose 0.6% month on month and 17.9% year on year. On a contract-currency basis, the month-on-month contributions were 0.29% for metals and related products, 0.23% for other commodities and manufactured products, 0.15% for electrical and electronic equipment, and 0.04% for general-purpose, production, and business equipment, while chemicals contributed a decline of 0.02%.

The overall average of the Import Price Index was 193.7 on a yen basis, down 3.0% month on month and up 16.7% year on year, while on a contract-currency basis it fell 1.0% month on month and rose 24.8% year on year. On a contract-currency basis, the month-on-month contributions were a decline of 1.18% for petroleum, coal, and natural gas and 0.08% for chemicals, while electrical and electronic equipment contributed 0.10%, general-purpose, production, and business equipment 0.08%, and metals and related products 0.06%.

Among the items in the Domestic Corporate Goods Price Index, the index for nonferrous metals was 261.1, up 43.3% year on year; petroleum and coal products were 178.5, up 14.7%; and plastic products were 130.5, up 11.2%. Electricity, city gas, and water had an index of 143.5, down 2.2% month on month, while information and communications equipment had an index of 114.1, up 0.1% month on month. The overall-average weight was 1,000.0.

Among the items in the Export Price Index, electrical and electronic equipment had a yen-based index of 173.4, up 37.9% year on year; chemicals were 166.5, up 15.1%; and metals and related products were 230.1, up 26.9%. In the Import Price Index, petroleum, coal, and natural gas had a yen-based index of 297.6, up 42.2% year on year, while metals and related products were 237.8, up 34.4%.

The chain-linked Domestic Corporate Goods Price Index in the reference series had an overall-average index of 133.3, down 0.2% month on month and up 6.6% year on year. After adjustment for summer electricity charges, the index was 133.2, down 0.1% month on month and up 6.6% year on year. The year used to calculate the weights was 2023.

In the time series, the overall average of the Domestic Corporate Goods Price Index rose from 126.5 in August 2025 to 136.1 in August 2026; the overall-average yen-based Export Price Index rose from 137.5 in August 2025 to 162.1; and the overall-average yen-based Import Price Index rose from 155.2 to 193.7. In August 2026, the contract-currency-based indexes were 124.5 for exports and 142.0 for imports. The dollar-yen exchange rate was 158.7, down 2.4% month on month. The notes state that a negative sign for the exchange rate indicates yen appreciation and that r denotes a revised value. The time-series table also includes month-on-month, year-on-year, and three-month-prior changes.