Proponents of the currency intervention argue that the Japanese government had no choice but to act to prevent a full-scale economic crisis. When a currency loses value as rapidly as the yen has, it creates a dangerous feedback loop. Businesses struggle to plan for the future because they cannot predict the cost of imported raw materials, and consumers see their purchasing power evaporate at the grocery store and the gas pump. By intervening, the Ministry of Finance is fulfilling its duty to protect the standard of living for its citizens.
Furthermore, the coordination with the United States provides a necessary layer of credibility. If Japan had acted entirely alone, global markets might have viewed the move as a desperate, isolated act. By aligning with Washington, Tokyo sends a clear message that the current valuation of the yen does not reflect economic fundamentals and that the world's largest economies are aligned in their desire to prevent disorderly market conditions. This cooperation helps to anchor expectations and discourages aggressive speculation that could otherwise spiral out of control.
Ultimately, this action is a defensive measure designed to buy time. It provides a buffer for the Japanese economy while policymakers work on more permanent solutions, such as structural reforms or eventual shifts in monetary policy. Without this intervention, the risk of imported inflation would have likely forced an even more painful economic adjustment, potentially leading to higher unemployment or a deeper recession. Supporting this move is essentially supporting the stability of the global financial system.