Sources say Tokyo prosecutors are seeking help from outside Japan to investigate the financial transactions of former Nissan Motor Chairman Carlos Ghosn.
Ghosn was arrested for the fourth time on Thursday, on suspicion of aggravated breach of trust.
Prosecutors are asking authorities in the Middle East, Switzerland and the United States to help track a series of transfers Ghosn allegedly orchestrated.
They say he directed Nissan funds to a dealership in Oman and then sent them to a bogus company in Lebanon that he virtually owns, causing Nissan to lose money.
About 27 million dollars was then transferred from the Lebanese company to US firm Shogun Investments, run by Ghosn's son. Another 8 million dollars was transferred to Beauty Yachts, a company where Ghosn's wife is an executive.
The funds were sent via multiple accounts at Swiss and other financial institutions. It's believed that Ghosn used the money to purchase an Italian-made yacht.
Ghosn is denying all charges brought against him.