Japan Finance Minister Satsuki Katayama said the government will take decisive action if the yen continues to depreciate rapidly.

The warning comes as the currency hits levels not seen in nearly four decades, threatening economic stability and increasing the cost of imports for the world's fourth-largest economy.

Speaking during an interview on Wednesday, Katayama addressed the currency's slide, which has seen the yen fluctuate between ¥161.80 [2] and ¥163 [1] per U.S. dollar. This represents a 39-year low [2]. Katayama said the government would take "decisive action" if necessary to stabilize the market [1].

The minister said the government would take "decisive measures" if speculative movements continued to drive the currency down [2]. This rhetoric follows a pattern of warnings issued by the ministry over the last month. On June 19, Katayama said the need for "decisive measures" [3] to curb the slide.

Geopolitical tensions in the Middle East and speculative pressure have been primary drivers of the currency's weakness [1]. These factors have pushed the yen to its most vulnerable state in decades, prompting the Japanese government to coordinate with international partners.

Katayama has already begun high-level discussions regarding the issue. On June 22, she met with U.S. Treasury Secretary Janet Yellen [4] to discuss currency stability. The talks continued through June 23 [4] as both nations addressed the volatility of the exchange rate.

While the ministry has not yet confirmed a specific trigger for market intervention, the repeated use of "decisive action" suggests a low threshold for government interference. The government's primary goal remains the mitigation of excessive volatility that could disrupt domestic pricing, and inflation targets [2].

Japan Finance Minister Satsuki Katayama said the government will take decisive action if the yen continues to depreciate rapidly.

The Japanese government is signaling a readiness to move from verbal warnings to physical market intervention. By citing a 39-year low and coordinating with the U.S. Treasury, Tokyo is attempting to deter currency speculators who bet on a weaker yen. If the currency continues to slide past the ¥163 mark, the government may sell U.S. dollar reserves to artificially inflate the yen's value, a move that could spark temporary market volatility but is seen as necessary to prevent runaway import inflation.