He was drawing tens of millions of dollars from Renault-Nissan-Mitsubishi motors alliances and perhaps he thought he was immune to any criminal persecution but after all he was just a greedy dude. Despite making that much money from the world largest ( in production numbers ) Automobile alliance, Nissan-Renault-Mitsubishi, he did not wanting to pay due taxes and also putting his hand in the Nissan's cookie-jar and with the help of Greg Kelly, another accounting CEO, they were stealing from Nissan coffin.
Back in 1998, Nissan was bleeding red by $billions, accrued more than $20 Billions in losses, they were in the brink of imminent bankruptcy, then Came the French guvnmnt with $ 1 Biilon investment and sent Carlos Ghosn as the cost cutter master mind. He did fix Renault by cutting cost by $20 billions so for him to fix Nissan was an easy task.
He also fixed Russia's auto manufacturer owned by Renault. So he was a kind of restructuring Maverick but his leniency brought him down. Tokyo prosecutor office says that Carlos Ghosn was making close to $100 millions but only reporting one half of his income. You making money, you have got to pay your share as tax or else, all your money and power is worthless...
https://www.bloomberg.com/news/articles ... ium-Europe
Carlos Ghosn impressive bio: http://www.achievement.org/achiever/carlos-ghosn/