Decision to Extend the Taxable Period of Anti-Dumping Duties on Dipotassium Carbonate Originating in the Republic of Korea

1．Background

The Government of Japan has been imposing anti-dumping duties on dipotassium carbonate originating in the Republic of Korea (The rate of the anti-dumping duties: 30.8%) in accordance with the provisions of the Customs Tariff Law and relevant orders. The taxable period began on June 24, 2021, and remains in effect.

The investigating authority, which consists of the Ministry of Economy, Trade and Industry and the Ministry of Finance, initiated a review in August 2025, upon a request made in June by the domestic producer, AGC Inc., to extend the current taxable period of the anti-dumping duties on dipotassium carbonate originating in the Republic of Korea.

The review results show that the expiry of the duties would be likely to lead to a recurrence of dumping and injury to the domestic industry caused by the dumped imports.

On June 23, 2026, the Council on Customs, Tariff, Foreign Exchange and Other Transactions (the Trade Remedy Subcommittee of the Customs and Tariff Committee) reported to the Minister of Finance that it was appropriate to extend the taxable period of anti-dumping duties on dipotassium carbonate originating in the Republic of Korea for five years, based on the results of the review carried out by the Government.

2．Outline of the Cabinet Order

This cabinet order extends the current taxable period of anti-dumping duties on dipotassium carbonate originating in the Republic of Korea.

3. Next Steps

The cabinet order will be made public on July 8, 2026, and the taxable period will be extended until July 7, 2031.

Divisions in Charge

• Office for Trade Remedy Investigations, Trade Control Department, Trade and Economic Cooperation Bureau

• Material Industries Division, Manufacturing Industries Bureau