https://www.reuters.com/article/us-southkorea-japan-laborers/south-korea-says-may-retaliate-against-japan-high-tech-export-curbs-idUSKCN1TY32O >South Korea said on Thursday it may retaliate against Japan's latest export limits on high-tech materials, as a row over forced wartime labor threatened to disrupt global supplies of memory chips and smartphones.