China launches anti-dumping probe into Japan chipmaking chemical

By Hiroshi HIYAMA
Beijing (AFP) Jan 7, 2026

China on Wednesday announced an anti-dumping probe into imports from Japan of a key chemical used in making semiconductors, a day after it banned the export to the country of goods with potential military uses.

The commerce ministry in Beijing said that "from 2022 to 2024, the quantity of dichlorosilane imported from Japan generally increased, while the price cumulatively decreased by 31 percent".

"The dumping of imported products from Japan has damaged the production and operation of domestic industries," it said in a statement.

Japan is a major global supplier of dichlorosilane and the probe comes at a time of rising diplomatic tensions between the Asian giants.

China has ramped up pressure on its neighbour after Japanese Prime Minister Sanae Takaichi suggested in November that Tokyo may react militarily to an attack on Taiwan, which Beijing has vowed to seize control of by force if necessary.

China's foreign ministry spokeswoman Mao Ning told a news conference Wednesday that Takaichi's "erroneous remarks regarding Taiwan... blatantly interfere in China's internal affairs, and threaten military force against China".

China on Tuesday blocked exports to Japan of "dual-use" items with potential military uses.

While the export ban statement did not mention specific items, it has fuelled worries in Japan that Beijing may choke supplies of vital rare earth minerals, some of which are included in China's list of dual-use goods.

China is by far the world's biggest supplier of rare earths, which are crucial for a range of tech products from smartphones to fighter jets.

Masaaki Kanai, the top official in Japan's foreign ministry for Asia-Pacific affairs, "strongly protested and demanded the withdrawal of these measures".

Kanai said the bans "deviate significantly from international practice, is absolutely unacceptable and deeply regrettable".

- 'Pressure on Takaichi' -

More than 70 percent of Japan's rare earth imports are from China, according to the Japan Organization for Metals and Energy.

That is in spite of Tokyo's efforts to diversify supplies following a 2010 row that saw Beijing temporarily cut off shipments of the minerals to Japan.

Global risk consultancy Teneo said the ambiguous wording of the Chinese statement may be intended to press Takaichi to take a more conciliatory stance towards Beijing.

"The brief statement by China's commerce ministry is vague, and the impact of the new measures could range from almost entirely symbolic to highly disruptive," it said.

"By triggering concern in Japan about the ongoing availability of critical Chinese industrial inputs, the announcement puts immediate pressure on Takaichi to offer concessions."

Takahide Kiuchi, executive economist at Nomura Research Institute, said the impact on the Japanese economy would be "extremely severe" if China included rare earths in export controls.

He estimated that a three-month ban could cost Japan 660 billion yen ($4.2 billion).

"Particularly for rare earths like dysprosium and terbium, which are auxiliary materials for neodymium magnets used in EV (electric vehicle) motors, Japan is said to depend almost 100 percent on China," he added.

Japan's top government spokesman Minoru Kihara declined Wednesday to comment on the impact on Japan's industries, citing "the numerous unclear points... including the scope of the measures".