"They need a leader," said Christopher Richter, deputy head of Japan research at CLSA, an investment and brokerage group. "The alliance is in a crisis right now and there are hard decisions that need to be made." Nissan's board will meet on Monday to appoint a replacement for Mr. Ghosn, who had already been removed as chairman, according to a person with knowledge of Nissan's internal investigation. At some point after that, it will set a date for a shareholders meeting to vote to remove Mr. Ghosn from the board altogether. The board is also expected to propose a shareholders resolution to remove Greg Kelly, a former Nissan human resources manager who was arrested with Mr. Ghosn, the person said. Renault has stuck by Mr. Ghosn amid tensions between it and Nissan. The Renault board said on Thursday that an internal inqurity into Mr. Ghosn's compensation had uncovered no irregularities, and that he would remain chief executive.