JAPAN'S NTT FORECASTS PROFITS FALL IN 1987/88 <Nippon Telegraph and Telephone Corp> (NTT) expects its profits to fall to 328 billion yen in the year ending March 31, 1988 from a projected 348 billion this year, the company said. Total sales for the same period are expected to rise to 5,506 billion yen from a projected 5,328 billion this year, NTT said in a business operations plan submitted to the Post and Telecommunications Ministry. NTT said it plans to make capital investments of 1,770 billion yen in 1987/88, including 109 billion for research and development, as against a total of 1,600 billion this year. An NTT spokesman said increased competition from new entrants to the telecommunications field and the effect of a sales tax scheduled to be introduced next January, were the major factors behind the projected decrease in profits. The Japanese telecommunications industry was deregulated in 1985.