Japan's support would be the most important to the United States among its allies for defending Taiwan in the event of Chinese aggression, according to a U.S. think tank.Given its geographic limitations, the United States would have to rely on support from allies in the Asia-Pacific region, and "above all Japan," the Council on Foreign Relations said in a recent report, titled "U.S.-Taiwan relations in a new era."Japan hosts about 54,000 U.S. troops and the headquarters of some U.S. key units such as the Navy's 7th Fleet and the 31st Marine Expeditionary Unit, the report noted."The United S…READ FULL ARTICLE