Key US lawmakers urged Japan to strengthen restrictions on selling semiconductor manufacturing equipment to China. They warned that if Tokyo does not take action, Washington may impose its restrictions on Japanese companies, according to Bloomberg. Leading Republicans and Democrats on the House Committee on China expressed their concerns in a letter dated October 15 to Japan’s Ambassador to the US Shigeo Yamada, which the agency has reviewed. They dismissed arguments that restrictions significantly harmed semiconductor equipment companies such as Tokyo Electron Ltd. The letter cites rising sto…