Japanese banks including Mitsubishi UFJ Financial Group Inc. are urging customers to use accounts at rivals for fund transfers as a widespread system glitch continues for a second day.

The trouble at the Zengin System for domestic interbank remittances has hit 11 banks since Tuesday morning, and the operator is unable to say when it will be fixed.

It has delayed about 1.4 million transactions involving money sent from these banks, the operator said at a briefing on Tuesday evening. That figure excludes transactions in which other financial institutions tried to send money to these lenders.

MUFG Bank Ltd., a unit of Mitsubishi UFJ, asked clients to consider using other banks if they have urgent money transfer needs. Resona Bank Ltd. told customers that fund transfers with other lenders could be delayed to the next day.

The Japanese Bankers Association, which operates the Zengin System, said the glitch emerged after the replacement of relay computers during the long weekend that lasted through Monday. An association official said it is looking into the causes with NTT Data Corp., the information technology vendor for the system.