The minutes from the Bank of Japan's (BoJ) monetary policy meeting at the start of last month, which led to the introduction of a raft of radical policies aimed at boosting inflation, reveal the rationale behind the "extremely aggressive" moves.

The discussions make clear that the committee is unanimous about the scale of action needed, with some members arguing the central bank faces an unmissable opportunity to overcome deflation and others emphasising the need to send an unambiguous message