Taiheiyo Cement Corp said it has raised its forecast  of net profit for the year to last March to Yen 8bn from Yen 5bn. This is because the company expects an increase in extraordinary profit arising from the sale of securities.   The cement maker also lifted its forecast of current profit to Yen 49bn  from Yen 47bn, and of revenue to Yen 900bn from Yen 880bn.