Japan and South Korea Move to Support Their Currencies

The South Korean won remained firm against the US dollar amid signs that Seoul intervened in the foreign exchange market to prop up the currency, apparently acting in tandem with Japanese authorities working to support the yen. The coordinated stance reflects growing discomfort in Tokyo and Seoul over currency weakness that raises import costs and complicates the inflation picture for two economies heavily reliant on imported energy. Japanese officials have signaled a readiness to counter excessive yen depreciation, and reports indicate the United States has voiced support for yen intervention, a notable shift that gives Tokyo more room to act. Underpinning the moves is a hawkish message from the Bank of Japan, which has been normalizing policy and monitoring currency swings closely, while analysts say sustained gains in the yen would ultimately require further rate increases rather than intervention alone. For South Korea, defending the won helps shield households and businesses from imported inflation at a time of elevated market volatility. The episode underscores how exchange-rate management has become a front-line concern for Asian policymakers navigating divergent global interest rates and geopolitical tension.