Haruhiko Kuroda

Bank of Japan (BOJ) Governor Haruhiko Kuroda has frustrated investors with his habit of surprising markets, and now the central bank's latest inflation forecast has some questioning his credibility.

"Now that the BOJ has admitted to failing to meet its target and put its credibility on the line, the risk is that another round of asset purchases could provoke a negative reaction," said Hiroaki Hayashi, at Fukokushinrai Life Insurance director of investment management, who expects the BOJ to ease further in April.