Japan's most closely watched gauge of money supply grew 2.1 percent in October from a year before following a revised 2.0 percent rise in September, the Bank of Japan said Tuesday in a preliminary report.

The average daily balance of M2 plus certificates of deposit came to 692.7 trillion yen, down from a revised 693.8 trillion yen in September. M2 consists of cash in circulation, demand deposits and quasi-money.

The key money supply gauge growth surpassed 2 percent for the second month in a row, reflecting sharp increases in demand deposits and certificates of deposit.