Although the review looked at Ghosn's Renault compensation, not Nissan compensation, the preliminary finding suggests he was not involved in endemic misconduct activity across the alliance companies and that misconduct charges against Ghosn are likely to remain a Nissan-only affair. The revelations are reported to have created a rift between the two firms, which are also in alliance with Mitsubishi.
The Board of Directors requested that Renault's lawyers continue their review and assessment of the information provided, in liaison with Nissan's lawyers, and promptly provide the Board with a new update on the situation.
Aubrey Harwell, the US lawyer for Kelly, has said his client is innocent, and that Nissan insiders and outside experts had advised him the financial reporting was proper.
There is speculation that Nissan itself may be indicted in Japan as part of the case against Ghosn.
In court papers, lawyers for Ghosn said that since Nissan had entered the apartment after his arrest, the automaker could have "inserted objects or documents that could compromise his good reputation".
Ghosn, Kelly and Nissan Motor Co.as a legal entity were charged Monday with violating financial laws by underreporting Ghosn's pay by about 5 billion yen ($44 million) in 2011-2015.
The pair's detention period for the initial allegations against them was due to expire on Monday.
Ghosn, a towering figure in the global auto industry who had nonetheless prompted grumblings over a perceived lavish lifestyle, has reportedly told embassy visitors he is being treated well, but has complained of the cold in his cell and of the rice-based food. The maximum punishment in Japan for filing a false financial statement is 10 years in prison and a fine of 10 million yen ($89,000).
This did not prevent reports of tension between the three companies, which outsold every rival group a year ago, even though executives have said they remain "fully committed" to the alliance.
The Japanese press had already reported that Ghosn's sister, Claudine Bichara de Oliveira, could be embroiled in the scandal.
Nissan is 43.4 percent owned by Renault.