What Ghosn is experiencing is identical to what the US justice system inflicts on non-wealthy people.
Poor people and even "middle class" cannot afford to be accused of a crime. It is incredibly, impossibly expensive to afford justice.
In the US, it is far cheaper to accept a plea deal for a crime - even if innocent. Look at the US numbers for accused that actually "get their day in court".
Nolo estimates over 90% of cases never go to trial (https://www.nolo.com/legal-encyclopedia/how-criminal-cases-a... ) This sounds remarkably close to the Japanese numbers.