Japan stands ready to take all possible measures to counter excessively volatile currency moves, Chief Cabinet Secretary Yoshimasa Hayashi said on Tuesday, keeping markets on alert over the chance of renewed intervention to prop up the yen.

Bank of Japan data released on Tuesday suggested Tokyo may have spent 2.14 trillion yen ($13.5 billion) intervening on Friday last week. Combined with the estimated amount spent on Thursday, Japan is suspected to have bought nearly 6 trillion yen via intervention last week.