"QQE with Yield Curve Control" that the Bank currently adopts incorporates the mechanism in which the price stability target of 2 percent can be achieved through raising inflation expectations -- although it may take some time -- by maintaining nominal interest rates at low levels.
This is the most appropriate monetary policy framework at present, in that it has the largest positive effects and the smallest side effects. The Bank must keep seeking whether there is more appropriate monetary policy, but unless the effectiveness of a new policy is assured, I think it should continue with the current monetary policy.