JAPAN'S biggest wireless telephone group, NTT DoCoMo, has delighted analysts by staying in the black for the year to end-March. After forecasting earlier this year that it was heading for its biggest-ever loss, DoCoMo, an offshoot of Nippon Telegraph & Telephone, unveiled a net profit of 862m yen (£4.8m), after losing 103bn yen in the second six months.