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The producer price index in June was also counted up 9.9% from a year ago.
Analysts say that an increase in producer prices leads to consumer prices within three months, so price instability can continue until at least autumn.
By Kim Bum-joo, staff reporter.
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Producer prices rose 9.9% in June compared to a year ago.
The Bank of Korea announced that the producer price index in June was 120.04.
This is the sixth consecutive month of increase from 113.2 in December last year, reaching an all-time high.
The producer price index is the aggregate price of goods and services produced by producers on the market.
However, compared to the previous month, the increase rate is gradually decreasing to 0.5% in June, following 1.6% in April and 0.7% in May.
The Bank of Korea explained that international oil prices rose by about $5 per barrel in June based on Dubai crude, but the rate of increase decreased as the prices of some raw materials such as metals fell.
By sector, aquatic products rose 3% from the previous month, agricultural products rose 1.2%, and industrial products rose 0.7%.
By item, onions rose 84% due to the spring drought, while gasoline and diesel rose 11.2% and 9.8%, respectively.
Producer price increases usually affect consumer prices after one to three months.
This is because the prices of goods and services raised by producers are reflected in the prices consumers purchase after a certain period of time has elapsed.
The Bank of Korea said that the extent to which the rise in producer prices will affect consumer prices remains to be seen.