The Bank of Japan may take monetary policy action if the yen falls affect prices significantly, governor Kazuo Ueda said on Wednesday, offering the strongest hint to date the currency's relentless declines could trigger another interest rate hike. Finance Minister Shunichi Suzuki also voiced "strong concern" on Wednesday over the negative impact of a weak yen, such as boosting import costs, and repeated Tokyo's readiness to intervene in the market to prop up the sagging currency.