In the 1980s,Japan's semiconductor industry thrived rapidly in terms of technology level and market share,posing a fierce impact on the U.S.preponderance.The U.S.attached great strategic significance to the semiconductor industry and increasingly regarded Japan as a competitor in the high-tech field.The U.S.semiconductor industry and politicians shared common concerns about America's economic security and military superiority.Under such circumstances,the U.S.-Japanese semiconductor trade dispute arose and intensified increasingly.Both sides started inter-governmental semiconductor negotiations,which lasted for more than a decade.Under the asymmetrical alliance structure between the U.S.and Japan,the U.S.had always held the initiative.More specifically,the U.S.not only set the agenda for each stage of the negotiations,but also forced Japan to make concessions by the use of the Section 301 investigation,anti-dumping investigations,tariff sanction,etc.Eventually,Japan had to agree to mutually reduce and eliminate semiconductor tariffs,signed the U.S.-Japanese Semiconductor Agreement of 1986,accepted the U.S.guidance on export prices as well as the U.S.-developed market share calculation methodology,and accomplished 20 percent market share target by the end of 1992.Meanwhile,considering that the U.S.had its continuous strategic need to maintain and strengthen the U.S.-Japanese alliance,Japan could take advantage of the diplomatic autonomy to enhance its own strategic value to a certain extent.