Japan's top currency official said the country's foreign exchange intervention two months ago succeeded in supporting the yen, with no U.S. objections and some supportive comments from American authorities. Atsushi Mimura, vice finance minister for international affairs, told Bloomberg the market reaction proved the action had meaning.

The yen continues trading near four-decade lows, putting pressure on Japanese policymakers to defend the currency. Atsushi Mimura said he was unaware of any U.S. criticism of the intervention, suggesting coordinated approach between major economies facing currency volatility.

U.S. authorities apparently welcomed the move, which could influence future coordinated currency actions if needed. The intervention's success may give Japan more room to act again without facing international friction.

Mimura's comments signal Japan's willingness to defend the yen remains intact, though officials acknowledge the currency's fundamental weakness. Markets expect continued vigilance as the Bank of Japan maintains ultra-loose monetary policy.