In a significant move, Japan's government has intervened in the foreign exchange (forex) market, with total trades exceeding 11 trillion yen over the days of 30th and 31st. The intervention was designed to prevent further appreciation of the yen, which policy makers believe could harm Japan's export-dependent economy. Details of the particular motives or strategies behind this unprecedented involvement in the forex market are yet awaited.

In Japan, such forex interventions are seen under a microscope due to the significant reliance of the economy on exports. A strong yen could mean Japanese goods become pricier for foreign buyers, harming the country's trade balance. The government's decisive action, thus, would be seen as a measure to stabilize the economy, though it may have impacts on ordinary citizens and their purchasing power.

In contrast, the US and EU tend not to intervene directly in forex markets. Instead, they adjust monetary policy through central banks adjusting interest rates or through quantitative easing measures. Hence, such direct action by Japan is seen as an aggressive economic move in international finance.