Japan's Finance Minister Taro Aso said on Thursday he had expressed deep concerns to U.S. Treasury Secretary Jack Lew over one-sided currency moves that earlier this week saw the yen hit its strongest levels in more than 17 months against the dollar.
Aso met with Lew on the sidelines of a Group of 20 finance ministers' meeting in Washington that is expected to put currency policies high on the agenda.
"I told (Lew) that excessive volatility and disorderly currency moves would have a negative impact on the economy. I also expressed deep concern over recent one-sided moves in the currency market," Aso told reporters.
Arriving for the meeting, Bank of Japan Governor Haruhiko also described for the first time the yen's ascent so far this year as "excessive."