The special investigative unit is now waiting for replies to requests for cooperation made to foreign authorities, but a top official in the prosecutors' office disclosed, "Just how much evidence we will be able to gather is unknown".
Ghosn's lawyers have argued that the deferred amounts were not fixed commitments and did not need to be disclosed. "In all of my efforts on behalf of the company, I have acted honourably, legally and with the knowledge and approval of the appropriate executives inside the company".
Tokyo prosecutors yesterday filed two fresh charges of financial misconduct against former Nissan chief Carlos Ghosn, meaning the auto tycoon is unlikely to be leaving his Japanese jail cell soon. Ghosn has denied all of the allegations against him.
According to Ghosn's lawyer, the high fever the chairman ran on the night of January 9 has fallen. No trial date has been set for Ghosn.
Since his arrest, Ghosn has been removed as chairman by Nissan and Mitsubishi. The company is still investigating payments to the board - of which Ghosn is a member - made in previous years.
His wife Carole Ghosn issued a statement overnight out of Paris, expressing concern over his sickness. Such visits were cancelled Thursday but resumed Friday. Last month, he was indicted for under-reporting his income for an earlier period. "In general in such cases in Japan, it is indeed the case that bail is not approved before the first trial does take place", he said, adding that it could be six months before the case comes before a judge.
Ghosn has been interrogated daily but now will only be questioned with his consent, Kukimoto said.
The maximum penalty for the falsifying financial reports and breach of trust is 15 years in prison, a 10 million yen ($89,000) fine, or both.
According to the individual, under Ghosn's orders, subsidiary Nissan Middle East transferred roughly 3.5 billion yen to a representative Nissan dealer in Oman and another some 1.7 billion yen to a Lebanese representative dealership.
Japanese prosecutors on Friday slapped the 64-year-old with a formal charge of under-declaring his income by around JPY4 billion (USD37 million) over three years from 2015.
Before his sudden downfall, Ghosn was a respected figure in the global auto industry, having rescued the Japanese automaker from near-bankruptcy, building its sales operations and profits and pioneering ecological vehicles.
The crisis unleashed by Ghosn's arrest has deepened as Nissan CEO Hiroto Saikawa seeks to end 43.4 percent-owner Renault's grip on their alliance.
The company said in a statement that it took the latest charge seriously and was strengthening governance. It reiterated harsh words against Ghosn. Nissan is considering filing a criminal complaint or taking other action against Ghosn on the basis that the undisclosed remuneration caused damage to the automaker.