The Japanese currency yen is weakening against the dollar to levels not seen in decades, and the government has once again reiterated its stance on the issue.

On Wednesday, the yen is being traded for the dollar at the upper-148 to lower-149 level. It is edging closer to the 150 level that analysts say is psychologically significant, and might prompt Japanese authorities to conduct another currency intervention.

Japanese Finance Minister Suzuki Shunichi said wild fluctuations in the yen's value triggered by speculation are unacceptable.

He said he'll closely monitor market movements and take decisive measures against extreme changes.

Some market participants suspect that the recent flow of funds suggests a covert intervention by the government last week.

When asked about this, Suzuki declined to give a clear answer.

Suzuki said "Generally speaking, the government may announce currency interventions it has conducted, or may not publicize them at all. I cannot comment on this."

Meanwhile, Bank of Japan Governor Kuroda Haruhiko remains laser-focused on his easing policy and has no intention of adjusting interest rates, even by a small margin.

Kuroda told the budget committee that he recognizes that the weak yen is pushing up prices in Japan across the board but says the effects will subside next year, and gradually curb inflation.

Kuroda said "Trends in exchange rates and international commodity markets are extremely uncertain. So we will keep a close eye on those trends in financial markets and their impact on our country's economy and prices."

Kuroda indicated that the current rise in prices is temporary, saying consumer inflation from fiscal 2023 onward will drop to under 2 percent year-on-year.