Before setting off on a trip, one should know one's destination. In that spirit, a discussion of Japanese monetary policy should begin with some discussion of the policy objective. I leave until later how the objective can be achieved. The Bank of Japan Law, passed in 1998, sets price stability as a primary objective for the central bank.
Second, relevant government departments shall also set up and develop consulting, evaluation and service agencies in response to the needs of market growth so as to provide specialized, rapid and efficient public services to the market in the areas of collecting, processing and publishing information.