Japan experienced its steepest monthly decline in foreign reserves on record in August, with reserves dropping by $80 billion, or 6.18%, to $1.207 trillion. This marks the fourth consecutive month of falls, exceeding the previous high set in May when reserves shrank by 5.58%. The drop reflects continued efforts by Japan’s finance ministry to support the weakening yen, which hit a 40-year low against the dollar in late July.

Intervention measures undertaken by Japan involved substantial yen purchases funded by selling dollars, totaling 27.1 trillion yen ($189 billion) this year. This sum is the largest-ever annual amount spent on currency intervention by Japan, surpassing the prior record of 20.4 trillion yen set in 2003. The end of July also saw coordinated intervention with the United States, the first joint effort between the two countries to prop up the yen since 1998, supplementing Japan’s unilateral actions.

The yen’s slide had been driven by rising global bond yields, which increased the cost of holding Japanese government bonds and pressured their value downward. The interventions sought to counter these market forces by stabilizing the currency, an effort that has included multiple rounds of yen buying worth trillions of yen over recent months. According to experts, the decline in foreign reserves primarily results from these policy maneuvers rather than financial weakness in Japan’s economy.

Despite the loss of reserves, analysts stress that the interventions are a controlled response to market conditions rather than a sign of economic distress. Following the August interventions, the yen rebounded slightly, trading at about 156 against the dollar, improved from its July low of nearly 164. Japan’s continued active management of its currency highlights ongoing challenges amid volatile global financial conditions and shifting bond market dynamics.