Bank of Japan board member Yutaka Harada said on Wednesday the central bank must ramp up stimulus without delay if risks to the economy threaten achievement of its inflation target.
Harada, a vocal advocate of aggressive monetary easing, said the nation's economy was facing growing risks, including from slowing demand in China, simmering trade tensions, volatile stock price moves and weak private consumption.
Subdued inflation could heighten views among the public that prices won't rise much and delay the realization of the BOJ's 2 percent inflation target, he added.