A board member has commented on the potential actions of the Bank of Japan. Masu stated that the bank may need to raise rates quickly if inflation increases. This suggests that the bank is closely monitoring inflation and is prepared to take action if necessary.

Further details about the bank's plans and considerations are available from the source. The board member's statement indicates that the bank is aware of the potential need for rapid rate hikes in response to accelerating inflation.

The source provides more information about the Bank of Japan's potential course of action, but specific details are limited to the board member's statement about the possible need for rapid rate hikes.