TOKYO (Kyodo) -- Carlos Ghosn, chairman of the alliance of Nissan Motor Co., Renault SA and Mitsubishi Motors Corp., is set to be arrested on suspicion of violating a financial law, investigative sources said Monday.
The 64-year-old executive has been questioned by Tokyo prosecutors, the sources said, adding that he is suspected of having understated his income.
Nissan said it will propose dismissing him as chairman at a board meeting after an in-house probe, triggered by a whistleblower, found "severe" misconduct, including understating his income for a long time.
Among multiple "serious misconducts," Nissan said Ghosn had misused company funds for private purposes.
Nissan headquarters in Yokohama, west of Tokyo, was raided as part of the criminal investigation. Nissan said it will fully cooperate with the probe.
The carmaker -- part of the world's largest automaking alliance -- said it will hold a press conference later Monday.
Nissan paid Ghosn 1.098 billion yen ($9.73 million) for the financial year ended March 2017, and 735 million yen for the following year, according to Nissan's annual securities reports.
Ghosn became the chief operating officer of Nissan in 1999 to lead the Japanese carmaker's turnaround under a capital alliance with Renault.
He became the president of Nissan in 2000, shocking the Japanese business world by spearheading a recovery through plant closures and other drastic restructuring measures, earning a reputation as an aggressive cost-cutter.
His management style stood out in the Japanese business world for his focus on numerical "commitment" targets and aggressive reforms.
Under his nearly two-decade tenure, Nissan moved away from conventional practices in the Japanese auto industry. For instance, it negotiated aggressively with steelmakers to lower steel sheet purchase costs, triggering fierce competition among major steel companies.
The Brazilian-born Ghosn, who holds French citizenship, assumed the post of CEO at a shareholders meeting in June 2001, at which time he said he would stay at the helm until Nissan's full recovery.
He became Renault's CEO in 2005, pressing for further streamlining through joint procurement and development under the Nissan-Renault alliance.
After Mitsubishi Motors' sales plummeted in the wake of fuel data manipulation scandal, Nissan took control of the smaller Japanese automaker in 2016 by purchasing a big equity stake.
Ghosn then became chairman of the board of that automaker as well, and vowed to revive it by integrating Mitsubishi Motors into the Renault-Nissan manufacturing alliance.
In the first half of 2018, the alliance formed by Nissan, Renault and Mitsubishi Motors became the world's largest auto seller, outselling Volkswagen.
The alliance sold 5.54 million vehicles worldwide in the first six months, up 5 percent from the same period last year, according to data from the three companies.
The figure outstripped the 5.52 million vehicles sold by the Volkswagen group, the world's largest automaker for two consecutive years through 2017. The group includes the Audi and Porsche brands.