TOKYO :Japanese trading house Mitsui said on Wednesday it was raising its annual profit forecast by 6 per cent due to an improved performance from its liquefied natural gas and mineral and metal resources businesses. It now expects a net profit of 820 billion yen ($5.4 billion) for the year ending in March, though that still represents a decline of 8.9 per cent from the previous year. For the half year, net profit climbed 2.9 per cent from the same period a year ago to 423.7 billion yen. Mitsui,