Abe advisor says BOJ has room to work with

The Bank of Japan has plenty of room to loosen monetary policy and should act to counter the "speculative" rise in the yen, says Hoichi Hamada, a member of Abe's economic brain trust.

The comments were made in the Nikkei Asian Review.

"Additional easing such as deepening negative rates or expanding Japanese government bond purchases is a possibility, though I don't know if it'll come at the September meeting or in October or later," Hamada said.

He said that if the BOJ runs into problems maintaining its QE program, then it should buy foreign bonds.