The U.S. and Japan intervened to strengthen the yen, recalling the 1985 Plaza Accord, which damaged Japan’s economy. Washington targets undervalued Asian currencies; however, Japan must balance US security with economic autonomy. The author questions the intervention’s wisdom, citing risks like Japan liquidating US Treasury bonds, hurting US finance. Historical precedents, including Trump's past failures and the Plaza Accord’s detrimental effect on Tokyo, foster skepticism about this joint action benefiting Japan's economic independence.