"A huge profit" is fine grammatically, though it is editorializing a bit. If this was for a news article, we'd usually use AP style and compare with the same period the year before: "Panasonic Corp. released its first-quarter financial results on July 31. Net profit stood at 107.8 billion yen, a xx percent increase from the same period last year." But it would be better to start with the news of what the profit was or what the profit increase is: "Panasonic Corp's fourth quarter earnings rose/fell xx percent from a year ago, according to its latest financial report. The company reported earnings of 107.8 billion yen when it released its first-quarter financial results on July 31.

"A huge profit" makes sense, but just sounds wrong. I would render the sentence as, "Panasonic Electronics released its FY13 Q1 financial results on July 31. Net profit stood at a whopping JPY107.8 billion.