Photo/IllutrationNissan Motor Co. Chairman Carlos Ghosn (Asahi Shimbun file photo)

Prosecutors have obtained e-mails written by a representative board member at Nissan Motor Co. that gave orders to falsify the reported salary of Chairman Carlos Ghosn, sources said.

Corporate officers at Nissan turned over the e-mails to investigators as part of a plea-bargaining agreement, they said.

Ghosn, 64, was arrested on Nov. 19 along with Greg Kelly, 62, the representative board member, over allegations of the chairman under-reporting his income in Nissan’s annual securities reports for the period between fiscal 2010 and fiscal 2014.

According to the sources, Kelly sent the e-mails to other high-ranking officials, including a foreign corporate officer, who were directly involved in handling the suspected false entries about Ghosn’s salary over the five years.

Kelly’s e-mails said the orders given should be considered instructions from the company chairman himself, the sources said.

Ghosn’s total income in those reports came to about 4.987 billion yen ($44.2 million), but investigators say he was actually paid about 9.998 billion yen.

He and Kelly are suspected of violating the Financial Instruments and Exchange Law.

The corporate officers who were involved in the suspected falsified reports about Ghosn’s income could also face criminal responsibility. But the plea-bargaining agreement will lighten their penalties in exchange for their cooperation, including providing the e-mails, in the investigation.

Prosecutors on Nov. 21 also questioned Toshiyuki Shiga about Ghosn’s income reports. Now a director and board member, Shiga served as chief operating officer under Ghosn between 2005 and 2013.