Former Suntory Holdings Ltd. Chairman Takeshi Niinami has resigned as chief of a major business body, the group said Tuesday, after he came under police investigation over supplement purchases.The board of directors at the Japan Association of Corporate Executives, known as Keizai Doyukai, accepted his resignation request made at their meeting earlier in the day, it said.Senior Vice Chairman Mutsuo Iwai, who is chairman of Japan Tobacco Inc., will serve as acting chair until a new chief is selected, it said.Niinami told a press conference that he offered to resign "to avoid splitting" the a…READ FULL ARTICLE