Toyota Motor Corp raised its full-year operating profit forecast by 9.1 percent on Wednesday as a sharp decline in the yen against increases the value of repatriated earnings and makes up for lower vehicle sales. The world's biggest automaker now expects operating profit of 2.50 trillion yen for the business year ending March 31, rather than the previously forecast 2.30 trillion yen, thanks partly to a 135 billion yen contribution from foreign exchange gains.