The three main creditor banks of Daiei Inc. plan to increase their financial support for the troubled supermarket chain to 520 billion yen from the initially planned 420 billion yen, sources said Tuesday.

The extra funding will be included in a new three-year restructuring program to be unveiled by Daiei today.

UFJ Bank, Sumitomo Mitsui Banking Corp. and Fuji Bank decided to upgrade the bailout package to allay market and government officials' concerns that the earlier program would not be sufficient for Daiei to rehabilitate itself.