Tokyo prosecutors sought a two-year prison term Wednesday for, a former Nissan Motor Co. executive, for helping his former boss Carlos Ghosn to underreport his remuneration by millions of yen.

Former Nissan Motor Co. executive Greg Kelly gives an interview to Kyodo News in Tokyo on Sept. 8, 2020. (Kyodo)

In seeking the prison term during his trial at the Tokyo District Court, prosecutors said Kelly, 65, together with Toshiaki Onuma, a 62-year-old former chief secretary of Nissan, supported a system of "backdoor remuneration."

Under the scheme, Kelly and Onuma were set to make deferred payments to Ghosn under another name, according to prosecutors.

Prosecutors argued the role could only have been performed by Kelly, "who was a strategist with knowledge of the law and trusted by the former chairman."

The defense counsel for Kelly, who has pleaded not guilty, is scheduled to make its final argument on Oct. 27.

The American lawyer was a close aide of Ghosn, 67, who jumped bail to flee to Lebanon in late 2019. Earlier in his trial, Kelly said he denies the prosecutors' allegations and "was not involved in a criminal conspiracy."

Kelly also said that Ghosn, who claimed he feared being "held hostage by a rigged Japanese justice system" in explaining his flight while awaiting trial, could help prove he is innocent of charges of violating the financial instruments and exchange law.

The prosecutors argue that Ghosn instructed Kelly to find ways to provide deferred payments to him after the former titan of the global automaker agreed to a pay cut at Nissan.

They also claim that Ghosn and Kelly had "concealed the true remuneration" to avoid potential criticism from stakeholders.

Combined supplied photos of Carlos Ghosn (L) and Greg Kelly. (Kyodo)

Kelly and his defense team denied the claim, saying that Ghosn's compensation was never agreed upon. The defense team argued Kelly only took lawful actions to retain the former chairman because of his value as a business leader.

For Nissan, which itself is also a defendant in the trial, prosecutors sought 200 million yen ($1.8 million). The Japanese automaker has pleaded guilty.

According to the indictment, Kelly helped Ghosn conceal his remuneration from shareholders by around 9 billion yen over eight years through March 2018 in a scheme to give deferred payments to the once high-flying industry titan after retirement.

Kelly, who was arrested in November 2018, is suspected of having submitted to Japanese authorities financial reports only listing a total of about 7.9 billion yen as Ghosn's pay even though his actual income totaled about 17 billion yen.

Former Nissan Motor Co. Chairman Carlos Ghosn speaks in a pool interview with Japanese media organizations in Beirut on Jan. 10, 2020. (Kyodo) ==Kyodo