Trading house Mitsui & Co. said Wednesday its top managers will resign Sept. 30 to take responsibility for successive scandals that have tarnished the firm.

Shigeji Ueshima, 71, will resign as chairman of Mitsui, while Shinjiro Shimizu, 64, will step down as president.

Nobuo Ohashi, a 63-year-old Mitsui vice president, will become the firm's new chairman, while Shoei Utsuda, a 59-year-old senior managing director, will become its new president.