The Bank of Japan (BoJ) on Friday said Japan had finally achieved its long-standing inflation target of 2%, more than 13 years after the central bank adopted the goal to pull the economy out of decades of deflation. However, policymakers decided to keep interest rates unchanged, signalling a cautious approach towards further monetary tightening, according to an AFP report.The central bank said underlying consumer price inflation had reached a level broadly consistent with its 2% price stability target and was expected to remain around that level.