Finance Minister Jun Azumi on Tuesday indicated increased concern about the yen's advance, reiterating his resolve to take action against abrupt and speculative movements in foreign exchange markets.
"It's obvious that recent one-sided moves in the yen fail to reflect the real state of the Japanese economy," Azumi said at a news conference.
"We won't rule out any possible options to counter excessive moves" he said, adding that he is "ready to act decisively if needed."