The son of former Nissan Motor Co chairman Carlos Ghosn made about $US500,000 ($A702,451) in cryptocurrency payments to one of the two Massachusetts men who helped him escape from Japan, US prosecutors say in a court filing.
Federal prosecutors in filing late on Wednesday said the payments went to Peter Taylor after he and his father, US Army Special Forces veteran Michael Taylor, helped Ghosn flee in a box and private jet to avoid facing financial charges.
The cryptocurrency, or digital currency, payments from Ghosn's son, Anthony Ghosn, were on top of $US862,500 Ghosn himself had wired to a company Peter Taylor managed in October, two months before his December 29, 2019 escape, prosecutors said.
Prosecutors detailed the payments in a filing arguing against the Taylors' latest bid to be released on bail.
They have been in jail since their arrests in May at the request of Japan, which is seeking their extradition.
US prosecutors cited the money in arguing that both the elder Taylor, a private security specialist, and his son pose a severe flight risk, saying they "now have access to Ghosn's vast resources with which to flee".
Prosecutors cited a recent TV interview Ghosn gave in which he said he was helping everyone who stood with him.
Ghosn fled to Lebanon, his childhood home, after being charged with engaging in financial wrongdoing, including by understating his compensation in Nissan's financial statements.
Ghosn denies wrongdoing.
The Taylors argue the charges against them are fatally flawed as the Japanese penal code does not make it a criminal offence to help someone "bail jump" unless that person is in custody.
A federal judge will hear arguments on their latest bid for bail on Tuesday.