The yen remains weak against the dollar, with Japan's top currency official warning of potential intervention in currency markets to prevent excessive fluctuations. Vice Finance Minister Masato Kanda emphasized the negative impact of such fluctuations on the national economy and stated readiness to take action against speculation-driven movements. Recent interventions have already reversed gains made by the yen, with Japan spending $61.3 billion in April and May. Market analysts anticipate further intervention if the dollar-yen pair reaches a certain threshold. The Bank of Japan may reduce bond purchases in response to strong US data and inflation risks. Despite concerns about foreign exchange intervention, global authorities are in communication and Japan's stance remains firm, with Finance Minister Shunichi Suzuki indicating readiness to act against excessive currency movements. Transparency is key in Japan's currency strategy, with US counterparts in agreement.