Japanese telecoms behemoth Nippon Telegraph and Telephone Corp (NTT) today reported a 10% fall in operating profit for the nine months ended 31 December 2007, as its mobile arm NTT DoCoMo continues to flounder in an intensely competitive domestic mobile sector. NTT recorded operating profits of JPY874.38 billion (USD8.2 billion), down from JPY966.74 billion for the corresponding period of 2006. The telco said revenues fell marginally by 1.1% to JPY7.84 trillion as a result of weaker sales of its fixed line products and lower mobile phone receipts, all of which combined to help drive a 22% year-on-year fall in net income to JPY320.86 billion. DoCoMo in particular has been enduring a tough year. Its nine-month operating profit fell 7.7% from the figure reported the previous year as it spent more to win new customers from rivals KDDI and Softbank Mobile. Meanwhile, NTT, which is roughly one-third owned by the government, has admitted it is struggling to sign up users to its faster fibre-optic services. For the full year to 31 March 2008, NTT has kept its operating profit outlook at JPY1.32 trillion, which compares to JPY1.34 trillion, as forecast by 15 analysts surveyed by Reuters.