A second waiver for struggling companies whose debts were partially forgiven once should be given by banks only in exceptional cases, Financial Services Minister Hakuo Yanagisawa said Thursday.

If a bank opts to grant a second waiver, it should be done only in cases where such forgiveness is indispensable to enable the recipient to merge or integrate its management with another company that otherwise would shy away from the merger, Yanagisawa told reporters.

Basically, a second debt-waiver "is not desirable," he said. "Costs would be sizable" for the bank.