Mizuho Financial Group, the world's largest banking group, confirmed Friday that it has a backlog of at least 2.5 million incomplete transactions due to computer system glitches.
The problems are unlikely to be fully resolved until the end of next week at the earliest, executives said.
Around 105,000 transactions that were to have been completed Monday remain in the system. They include payments of utilities, phone bills and credit card bills. In addition, at least 3 million withdrawals by customers were recorded twice.