Former top officials of Mizuho Holdings Inc. should either repay their retirement allowances or have them reduced as a means of accepting responsibility for the massive computer debacle that threw operations at the firm's two banks into chaos in April, Financial Services Minister Hakuo Yanagisawa said Friday.

"I hope the banking group will deal with the issue strictly," Yanagisawa said.

Mizuho Holdings has said it will freeze retirement allowance payments for Masao Nishimura, Yoshiro Yamamoto and Katsuyuki Sugita, who were joint chief executive officers of Mizuho Holdings until March 31 and have been special advisers since April 1.