Prime Minister Shinzo Abe on Sunday called on Bank of Japan Gov. Haruhiko Kuroda to continue with the central bank's one-sided effort to reflate the economy, but added that he was undecided on whether to reappoint Kuroda to another five-year term.

Kuroda was handpicked by Abe to take the helm of the BOJ in 2013 to deploy a massive stimulus program — part of the prime minister's three-pronged Abenomics plan that was aimed at boosting growth with structural reforms. But the BOJ has failed to hit its inflation target of 2 percent, and any economic reforms remain scarce.

Abe said the government would continue to work with the BOJ to boost growth so he can officially declare an end to deflation at the earliest date possible.