The Bank of Japan may readopt the controversial zero interest rate policy in an effort to boost the country's ailing economy, governor Masaru Hayami has said.

BBC: Zero interest rates back on agenda

In a speech to journalists, Mr Hayami hinted that evidence that the country's economic recovery is failing may prompt the Bank to readopt a policy which saw the country operate with an interest rate of 0% for 18 months.

BBC: Zero interest rates back on agenda