Japanese authorities spent approximately $73.5 billion [1] to buy yen in a massive foreign-exchange intervention over the last month.

This aggressive move signals Tokyo's determination to prevent a currency collapse that could destabilize the national economy. By intervening in the markets, the government aims to curb volatility and prevent the yen from reaching levels that would drive up the cost of imports.

According to Finance Ministry data, the intervention occurred between April 28, 2026, and May 27, 2026 [2]. The total expenditure reached roughly 11.7 trillion yen [1]. This action followed a period where the yen slid past 160 yen per U.S. dollar [3].

While ministry data points to the $73.5 billion figure [1], other estimates based on Bank of Japan data suggested the spending may have been closer to $35 billion, or approximately 5.48 trillion yen [4]. The discrepancy highlights the complexity of tracking real-time currency interventions in global markets.

Japan typically keeps the exact details of its currency operations opaque to prevent speculators from predicting future moves. However, the scale of this recent spending indicates a critical threshold was crossed. The move to support the yen comes as the government struggles to balance domestic inflation with the need for a stable exchange rate.

The intervention represents a significant use of foreign reserves. By selling U.S. dollars and buying yen, the Finance Ministry creates artificial demand for the local currency to push its value higher. This process is often a last resort when verbal warnings from officials fail to move the markets.

“Japanese authorities spent approximately $73.5 billion to buy yen”

This record-level spending demonstrates that the Japanese government views the 160 yen per dollar mark as a critical psychological and economic boundary. By deploying such a vast sum of reserves, Tokyo is attempting to signal to global traders that it will not allow a free-fall of the yen, despite the diverging monetary policies between the Bank of Japan and the U.S. Federal Reserve.