Japan's core consumer prices leaped 3.0 percent in September, marking the sharpest gain in over 31 years, as a faltering yen inflated a range of import costs from energy to food, government data showed Friday, complicating the Bank of Japan's commitment to monetary easing.The nationwide core consumer price index excluding volatile fresh food items remained above the BOJ's 2 percent target for the sixth straight month, and economists expect it to rise further toward year-end.The headline figure marked the largest year-on-year increase since August 1991, if the effects of a series of consumpt…READ FULL ARTICLE