The government should be the entity that sets the nation's inflation target and should hold the Bank of Japan governor accountable if the goal is missed, according to a former aide and economic adviser to opposition leader Shinzo Abe.

"The governor should be made to appear in the Diet or write an open letter to explain why a target hasn't been met, as is the case in Britain," Yoichi Takahashi, a ex-Finance Ministry official and aide to Abe during his 2006-2007 prime ministership, said in an interview Tuesday.

"There's no need to go as far as having a provision to fire the governor."