The Bank of Japan is the central bank of Japan. The Bank of Japan Act states that the bank's monetary policy should be aimed at"achieving price stability, thereby contributing to the sound development of the national economy." The nine-member policy board reviews economic conditions at home and abroad before making a policy decision. There is no specific time for the announcement. The board holds eight two-day Monetary Policy Meetings a year, in January, March, April, June, July, September, October and December. At each meeting, the board votes on the proposals on the bank’s monetary policy stance and the basic guideline on how to achieve the policy target submitted by the chair of the board, who is the bank governor.

The announcement of the bank’s monetary policy decision after each meeting can cause a market reaction, even when there is no change to the policy stance. Markets tend to look ahead toward a policy shift, pricing in a change to the bank’s targets for overnight and long-term interest rates, the pace of financial asset purchases or the scale of market operations.

Market participants closely monitor the news conference by the BoJ governor that usually starts at 1530 JST (0130 EST/0230 EDT/0630 GMT), a few hours after the bank releases its policy decision. Comments from the governor could provide clues to what the bank may or may not do in the near term, which in turn could trigger buying or selling of the yen against the dollar.

Since April 2023, the bank has been conducting a"broad-perspective review" of the costs and benefits of its various monetary easing measures implemented in the past 25 years. The negative overnight interest rate target introduced in January 2016 has been unpopular among lenders as it squeezes their profit margins.