Mizuho Financial Holdings Inc. executives issued a stream of apologies at the banking group's general shareholders' meeting Tuesday, as shareholders demanded explanations for the widespread ATM failures and account mixups that marred the banking group's official launch in April.

"If the bank is not going to change under its current management, management should step down," one shareholder said during the two-hour closed meeting in Tokyo, according to a Mizuho official. Some shareholders specifically targeted Mizuho Holdings president Terunobu Maeda.

A total of 1,790 shareholders attended the general meeting, about twice the number who attended an extraordinary meeting in January.