committee called (the prosecution's decision) unjust," DPJ Secretary General Tatsuo Kawabata said as he challenged Prime Minister Junichiro Koizumi during a Diet session Thursday.

He asked Koizumi, who heads the LDP, if he still believes Hashimoto's explanation that he probably received the JDA donation but was never involved in falsifying the faction's political funds report to conceal it. The 100 million yen check was believed handed to Hashimoto at a dinner.

Kawabata was posing a question for Koizumi at the House of Representatives Budget Committee, urging him to demonstrate leadership and have the LDP members clean up their acts. Koizumi was noncommittal.

"I understand that each party has been proceeding with consultations on what (measures) would be needed," he told the committee. "I'd like the executive board (of the budget committee) and each party to have thorough consultations as to what kind of witness should be summoned."