The Bank of Japan kept its policy rate unchanged at 0% to 0.1% after its monetary policy meeting. This comes after Tokyo's April inflation was lower than expected at 1.6% versus estimates of 2.2%. The BOJ will continue bond purchases in line with its March decision of around $83 billion monthly. The yen weakened further against the dollar after the decision, trading around 156 yen to the dollar. BOJ Governor said exchange rate volatility could significantly impact the economy and prices.