Former Democratic Party of Japan Secretary General Ichiro Ozawa notified prosecutors through his lawyer Tuesday that he will submit to more questioning on a voluntary basis over his alleged misstatements in reporting his campaign funds, sources said.

It will mark the fourth round of questioning of the former No. 2 man in the DPJ over alleged false financial reporting involving his fund management body.

"I will of course comply," Ozawa was quoted by the sources as saying. He reportedly said he intends to respect an independent judicial panel's decision that past questioning of him seemed insufficient.

Ozawa hopes the questioning will be arranged after the eight-day extraordinary Diet session slated to convene Friday, according to the sources.