Bank of Japan (BoJ) Deputy Governor Hiroshi Nakaso said in a speech on Thursday that structural reforms were needed to boost the Japanese economy.

"I believe that monetary policy to overcome deflation and the structural reform to raise the potential growth rate must be pursued in tandem to bring Japan's economy back on track toward sustained growth," he said.

"I expect the original third arrow of Abenomics, the growth strategy, to fly higher and faster," Nakaso added.

BoJ deputy governor noted that the economy continued to expand.

"Although global financial markets have been volatile since the turn of the year, I believe there is no need to be too pessimistic as the fundamentals of Japan's economy have been firm," he said.