Japan begins expiry review of anti-dumping duties on KOH

The Government of Japan has launched an expiry review of anti-dumping duties on potassium hydroxide (KOH) originating in South Korea and China, according to a joint announcement issued on December 25, 2025, by the Ministry of Economy, Trade and Industry and the Ministry of Finance.

The review follows an application submitted on August 8, 2025, by the Potassium Product Manufacturers Association, seeking an extension of the current anti-dumping measures. After examining the application under World Trade Organization rules and Japan’s domestic laws, the ministries concluded that sufficient evidence exists to justify initiating the review.

Japan currently imposes anti-dumping duties ranging from 49.5 per cent to 73.7 per cent on potassium hydroxide imports from the two countries. These measures have been in place since August 9, 2016, and are due to expire on August 12, 2026, the Ministry of Economy, Trade and Industry said in a release.

The product, used in applications such as potassium salts, fertilisers and detergents, is covered in both liquid and solid flake forms, excluding shipments from Hong Kong and Macao.

The investigation is expected to be completed within one year. During this period, Japanese authorities will gather information from interested parties and conduct fact-finding reviews of companies in Japan, South Korea and China.

Based on the findings, the government will decide whether extending the anti-dumping duties is necessary to prevent the continuation or recurrence of dumping and material injury to domestic producers.

ALCHEMPro News Desk (HU)