To all appearances, Japan has remained Washington’s close ally, not only militarily but also in Washington’s efforts to constrain Chinese technological advances. Japan, for instance, has defied China in sovereignty disputes over unoccupied islands in the East China Sea. Tokyo has, if anything, committed itself more strongly than America to the defense of Taiwan. Japanese Prime Minister Fumio Kishida has made efforts to unify the G-7 advanced economies of the world to break China’s near monopoly on rare earth elements. Japan has also joined the Washington in some of its bans on trading technology with China. Statistics add an element to the story outside diplomatic exchanges. They show that Japanese business has made remarkable gains by stepping into the growing economic distance between the United States and China.
Japanese Business Gains From The U.S.-China Split [Forbes]
China Policy Research 