As part of the ongoing US-China trade war, since 2020 the US has restricted the exports of cutting-edge semiconductors from third countries to Huawei. This column analyses the indirect effects of US export regulations on exports of Huawei suppliers in Japan. Although Japan itself did not export cutting-edge semiconductors, exports of affected suppliers declined in 2020, particularly to unaffiliated firms in China. Furthermore, Japanese suppliers shifted exports to less risky destinations, with