TOKYO, Feb 2 (Reuters) - Mizuho Financial Group Inc , Japan's third-largest lender by assets, reported on Friday an 8.2% increase in quarterly net profit, helped by brisk loan demand from companies and a subdued level of loan-loss provisions.

Mizuho posted a profit of 226.57 billion yen in the October-December period versus 209.31 billion yen a year earlier, according to Reuters' calculations based on nine-month cumulative figures disclosed in a stock exchange filing.

The bank kept its full-year profit forecast through March at 640 billion yen, which compared with the 646.67 billion yen average of 11 analyst estimates compiled by LSEG. ($1 = 146.7100 yen) (Reporting by Makiko Yamazaki; Editing by Jacqueline Wong)