TOKYO, Aug 23 (Reuters) - Mizuho Financial Group"s (8411.T) main banking unit said its automated teller machines (ATMs) in some parts of Japan were hit by a system glitch on Monday. The problem follows a major glitch that left Mizho"s branches nationwide unable to process transactions on Friday, as well as a series of other recent technology problems. The latest glitch, which affected around 130 ATMs, started around noon (0300 GMT) and was mostly fixed by 1:30 pm, the bank said.