Haruhiko Kuroda, governor of the Bank of Japan, speaks at the central bank's headquarters in Tokyo, June 13, 2014.

The Bank of Japan Governor not only surprised the markets with his latest splurge of monetary easing. He sprang it on his own board members just two days earlier, jolted into action to stop them making a low-ball forecast that might have sunk his flagship inflation target.

To achieve maximum effect for the shock decision, Haruhiko Kuroda and right-hand man Masayoshi Amamiya kept only a handful of elite central bank bureaucrats in the loop as they laid the ground for the expansion of their quantitative and qualitative easing (QQE) program.