It's been a while since we've seen a major industrial CEO go completely rogue like Ghosn
To be fair, Japanese legal system appear really strict and borderline Kafkaian. Not to commiserate too much though there's obviously some Byzantine corporate politics (and just straight politics) between Renault and Nissan involved in the sudden outburst of revelations, I don't really doubt he dipped his fingers with some gluttony considering what's been made public. It's not even surprising within the hagiography built around him, abuse of power is the other side of the coin of that narrative of the cosmopolitan outsider who rose to the top on his personal genius who tamed the insular and inflexible Japanese protectionism, a modern day corporate daimyo.
Fleeing to Lebanon is pretty desperate. Maybe that's a way to force official French diplomacy to be a little more forthcoming, there will have to be talks on how to resolve this. But the French state has always been very cautious with the whole thing, certainly doesn't want to give the appearance of meddling into a business matter (it's been a longstanding problem for the Japanese, given how intertwined Renault and the state are... Not that Nissan is exactly virginal in that domain but heh)... And besides it's a little hard to cast aspersions on the Japanese justice legitimacy to investigate those serious accusations.
That will make a good movie, I have no doubt one will be made.