Or he knows he’s as guilty as sin and has no hope of being found not guilty.
If you have tons of money in off shore accounts, you are hopelessly guilty why not run.
There are a few Americans in Cuba for just that reason.
The government wanted Nissan to remain a Japanese company and with a threat of takeover by Renault they were going to do everything in their power to take him out. Arrest on an extremely flimsy charge of underreporting income, interrogate without a lawyer, strip civil liberties to the point of being unable to mount a defense, force a plea bargain deal that would allow him to resign — it is absolutely 100% this would never have happened to a Japanese CEO, or any crony of Abe’s government for that matter.