A general view of headquarters of the Bank of Japan in Tokyo, Japan.

Markets believe the Bank of Japan's reflationary credentials will be burnished by new board member Yutaka Harada this month, but a closer look at his views suggests he is unlikely to back an early expansion in the bank's massive monetary stimulus.

The 64-year-old Waseda University economist certainly believes, like BOJ Governor Haruhiko Kuroda, that monetary stimulus, if deployed aggressively enough, can reflate Japan out of two decades of falling prices and fitful growth.