BOJ must aim to achieve 2% inflation on average for prolonged period
But doesn't necessary need to achieve 2% inflation all the time
Early exit guideline by Fed ended up being unproductive
It is an example that laying out exit strategy too early is not desirable
Regional banks could face challenges in the next 5, 10, 15 years as profits dwindle
But BOJ's current easing policies likely won't be intact for such a long period of time