Reuters reported that the US Treasury Secretary Janet Yellen respects Japan's stance of not disclosing whether it had intervened in the foreign exchange market, Japan's top currency diplomat said on Wednesday, adding he was in close touch with the United States every day.

"We will monitor the market to see if there are any excessive, disorderly moves and will continue to take decisive steps as needed," Vice Finance Minister of International Affairs Masato Kanda told reporters at the ministry.