Tokyo — Former Nissan boss Carlos Ghosn abruptly cancelled Friday plans for what would have been his first media conference since his arrest in November after journalists had been notified about a briefing just two hours earlier.

Ghosn's lawyers called to cancel the event that was to be held at the Foreign Correspondents' Club of Japan (FCCJ), but did not immediately give a reason for the abrupt change, an official at the FCCJ said.

A spokesperson for the Ghosn family in Tokyo did not answer his mobile phone and did not immediately respond to an e-mailed request for comment.

If the conference had not been cancelled, Ghosn would have spoken as Japanese Prime Minister Abe Shinzo hosts national leaders at the Group of 20 (G20) leaders gathering in Osaka, including US President Donald Trump and French President Emmanuel Macron, who Ghosn's wife Carole have called on to raise the issue of her husband's treatment by Japan's courts.

In May a Japanese court dismissed an appeal by Ghosn to ease a bail restriction that bans him from contacting his wife and rejected a subsequent request to allow him a one-off monitored meeting with Carole. His lawyers have argued that that condition violates Japan's constitution and international law on family separations.

Ghosn's movements are also monitored and he is only allowed internet access from a computer at his lawyer's office that records the activity for the court.

Once among the world's most feted vehicle executives, Ghosn is awaiting trial in Japan over charges including enriching himself at a cost of $5m to Nissan, in a scandal which has rocked the industry and exposed tensions in the vehicle-making partnership between Nissan and Renault.

Since his initial arrest in November, Ghosn has been charged four times for crimes which also include under-reporting his Nissan salary and temporarily transferring personal financial losses to his employer's books during his time at the helm of Japan's number two carmaker.

Ghosn has denied any wrongdoing saying he is the victim of a boardroom coup, accusing "backstabbing" former colleagues of conspiring to oust him from Nissan in order to derail a closer alliance between the Japanese automaker and Renault, its top shareholder.