The Japanese yen has weakened significantly, touching the critical psychological level of 150 per dollar, raising concerns about potential market intervention by the Bank of Japan. Japan's top foreign exchange diplomat, Masato Mimura, issued a warning regarding the 'one-sided' movements of the yen as it fell past this threshold. He emphasized that he is closely monitoring market fluctuations, reflecting anxiety among strategists who predict further declines in the currency's value. The situation has intensified discussions about the implications of the yen's depreciation on Japan's economy and foreign exchange policy.