Since the global financial crisis, the Federal Reserve in the United States and some other central banks introduced "forward guidance," in which a central bank provides information about the future course of monetary policy. It is common for a central bank to design the forward guidance based on its forecast.
However, in Japan, where the observed CPI has been below 2 percent for a long period, in order to raise inflation expectations to around 2 percent and anchor them firmly at that level, it is essential that the public actually experiences inflation at or above 2 percent for some time and thereby the perception takes hold among them that prices of goods and services tend to go up every year by around 2 percent.