TOKYO, Sept 24 (Reuters) - Japan’s core consumer prices were flat in August, ending a decline for the first time in 13 months, data by the Ministry of Internal Affairs and Communications showed on Friday. The so-called core-core inflation index, which excludes food and energy prices and is similar to the core index used in the United States, fell 0.5% in August from a year earlier. The core consumer price index data, which excludes volatile fresh foods but includes oil products, matched a median market forecast for a flat reading, following the prior month’s 0.2% decline, far below the Bank of Japan’s 2% inflation target. For the Poll story, click For the full tables, go to the ministry"s website at: here (Reporting by Tetsushi Kajimoto Editing by Chang-Ran Kim)