NTT DoCoMo Inc., the nation's top mobile phone firm, said Thursday it posted a group net profit of 212.49 billion yen for the year through March, thanks to strong growth stimulated by camera-equipped handsets.

Under U.S. accounting rules, which the firm adopted in the past business year, the comparable figure for the previous year was a net loss of 116.19 billion yen.

The firm, 63 percent owned by former state monopoly Nippon Telegraph and Telephone Corp., said its group pretax profit surpassed the 1 trillion yen mark for the first time, with operating profit up 5.6 percent to 1.06 trillion yen and sales up 3.2 percent to 4.81 trillion yen.