Many Bank of Japan policymakers see stronger wage growth as key to sustaining the bank's 2% inflation goal, according to a summary of opinions expressed at a June meeting, underscoring their resolve to maintain ultra-low interest rates.

The summary of views voiced at the bank's June 16-17 rate-setting meeting, published on Monday, showed one board member said sharp yen falls could hurt the economy by making it difficult for companies to set business plans, highlighting policymakers' concern over the currency's plunge to 24-year lows.

At the meeting, the BOJ stuck to its ultra-low interest rate policy and vowed to defend its cap on the 10-year bond yield with unlimited buying, bucking a global wave of monetary tightening in a show of resolve to focus on supporting a tepid economic recovery.