Struggling supermarket-chain operator Daiei Inc. said Wednesday that former President Tadasu Toba, who was demoted to director in October over his alleged involvement in shady stock deals, will step down Monday -- earlier than planned.

Scheduled to endorse a new management team under Adviser and President-designate Kunio Takagi on Jan. 30, Daiei had planned to let Toba resign that day, but approved his request to leave earlier, the company said.

Another former executive, Kazuo Kawa, who was also demoted over the scandal and was due to resign Jan. 30, retired as of the end of last year.