The Bank of Japan will continue to employ every possible measure to achieve its goal of 2 percent inflation, BOJ Gov. Haruhiko Kuroda said Wednesday.

The central bank "will do whatever it can to achieve the price stability target at the earliest possible time," Kuroda said at a seminar, after the BOJ surprised financial markets last week by expanding its aggressive monetary easing policy.

"If downside risks to prices become substantial, it will be a natural and logical move to take additional measures," he said, in reference to the downward pressures on prices from weak private consumption following the consumption tax hike in April, as well as from recent sharp falls in oil prices.