Shizuka Kamei, policy chief of the ruling Liberal Democratic Party, urged the Bank of Japan to ease monetary policies to put the economy on a self-sustainable recovery path.

Kamei said the central bank should carry out a quantitative easing of monetary policy and return to the "zero-interest-rate" policy it abandoned in August.

"The reason why the economy is still not on a stable recovery track is that there is a discrepancy between (the BOJ's) financial policies and (the government's) economic policies," Kamei said during a lecture at the Foreign Correspondent's Club of Japan in Tokyo.