The Bank of Japan is adding to the risks of its aggressive monetary easing policies by discussing only their potential upside, according to recently departed Policy Board member Takahide Kiuchi.

"Communicating only bullish confidence about the positives is a big problem," Kiuchi said in an interview Friday.

Kiuchi, whose five-year term ended in July, voted against most of BOJ Gov. Haruhiko Kuroda's unprecedented easing measures. Kiuchi argued that the benefits were not worth the risks, which he said included possible market disruptions and potential losses on the BOJ's balance sheet.