None of this is happening by accident. While Japan’s rearmament began years ago, its quickening pace comes alongside increased U.S. focus on containing China. The Trump administration was working along these lines, too, but its efforts were frequently complicated by the former president’s myopic focus on other issues. Too often, he threw obstacles in front of efforts to build a strong alliance to contain China, such as his demand that South Korea quintuple its annual payment for U.S. bases. Biden quickly put an end to that dispute, agreeing to a five-year deal in early March that fixed South Korean payments at dramatically lower levels than Donald Trump sought.