China Imposes 99.2% Duty on Japan Chip Chemical

China's commerce ministry imposed anti-dumping deposits of up to 99.2% on dichlorosilane (DCS) imports from Japan, a chemical critical to semiconductor fabrication, targeting exporters including Shin-Etsu Chemical. Tokyo protested the move, which comes amid escalating diplomatic tensions after PM Takaichi's remarks on Taiwan.

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The 99.2% deposit requirement effectively prices Japanese DCS out of the Chinese market in the near term, hitting Shin-Etsu Chemical and other exporters that dominate ultrapure DCS supply for chip fabrication. Chinese chipmakers reliant on Japanese ultrapure DCS for CVD deposition processes in logic and memory production face potential cost increases or sourcing disruptions. The move is framed as anti-dumping but is widely seen as retaliation tied to broader Japan-China diplomatic friction over Taiwan, suggesting further tit-for-tat trade measures targeting semiconductor supply chains are likely. Markets should watch for Japanese government countermeasures and whether China extends similar deposits to other specialty chemicals. Longer term, this accelerates both Chinese efforts to localize critical chip materials and Japanese/allied diversification of chemical supply chains away from single-market exposure.