The 64-year-old has not spoken in public since his release on 1 billion yen ($9 million) bail from the Tokyo Detention House, where he had been held since his arrest on November 19.
He's now preparing for trial, and he claims he's the victim of a plot from inside the company.
Ghosn, previously considered a flight risk by the court, is now under a travel ban as part of his bail agreement, to ensure he does not leave Japan.
Sources say Ghosn's lawyers told the detention house that they wanted him dressed in a work uniform and driven away in a small van.
The globe-trotting executive with residences all over the world will be restricted to Japan as part of the bail conditions.
Speaking to AFP and French daily Les Echos in January - his only interview with foreign media since his arrest - Ghosn said his continued detention "would not be normal in any other democracy". He says he is innocent, that the income allegedly under-reported was never paid or decided, Nissan never suffered the investment losses and the payments were legitimate business expenses.
Ghosn out on bail after 108 days in detention
UPDATE - March 8: A lawyer for Ghosn has apologised for advising him to use the disguise.
The Brazilian nearly succeeded in slipping past waiting journalists as he was freed in Tokyo ahead of a trial over alleged financial misconduct. Le Borgne said he was concerned whether the defense will get full access to all documents to be presented as evidence.
Other provisos of his bail are based around making sure Ghosn can not tamper with evidence or contact Nissan executives or others involved in the case.
Ghosn's lawyers want to establish his innocence, rebuild his reputation "and show what has happened is nothing but a awful accident of a great boss", Le Borgne said Wednesday. He gained his release on bail only after offering to adhere to restrictions to prevent that.
France's finance minister said the decision to free Ghosn on bail would allow him to defend himself "freely and serenely".
While Ghosn is enjoying liberty after almost four months in solitary confinement, his lawyers have cautioned that prosecutors have leeway to file new charges.
Alighting from the tiny, non-descript van used to convey him out of the detention centre, having shed his mask and hat, Ghosn smiled.