Others are more qualified to answer for other countries. But either way, here again expectations will be important. While they are strongly held above zero, it will be easier for monetary policy to help get an economy out of an incipient deflation.
Were expectations of deflation to become entrenched, on the other hand, policy would face a much more difficult task to remedy the situation. This highlights the importance of articulating the goals of policy as clearly as possible, so as to give expectations an anchor. For inflation targeting countries such as Australia, stressing the symmetry of the target is quite important in this context.