The Tokyo District Public Prosecutor's Office on Monday indicted former Nissan Motor Co. Chairman Carlos Ghosn for a fourth time, this charge for allegedly misappropriating the company's money for personal use — an accusation described by legal experts as the most serious brought against him so far.

With the latest charge, Ghosn is accused of expropriating a Nissan subsidiary's payments to Suhail Bahwan Automobiles, a Nissan distributor in Oman.

Prosecutors allege that some of the money, about ¥560 million, had been siphoned off by Ghosn and sent to Good Faith Investments (GFI), a Lebanese investment firm he effectively controlled, for his own personal use, such as for the purchase of a luxury yacht.