Finance Minister Sadakazu Tanigaki said Friday that the U.S. should try to fix its fiscal and current account deficits, with these deficits being cited as a major factor behind the dollar's recent slide.

"I think it is necessary to call on the U.S. to improve its twin deficits," Tanigaki told the Japan National Press Club, adding that at the same time, Japan and Europe must work to bolster domestic demand led by their private sectors.

Tanigaki reckoned that the dollar's slump against the yen and the euro was unwarranted, stating that U.S. economic fundamentals are strong.