https://www.cnet.com/roadshow/news/nissan-carlos-ghosn-public-statement-arrest/

The judge will likely explain the official reasons for Ghosn's detention, and attorneys for both the prosecution and defense will be allowed to speak during the court's session. In addition to shining a light on Ghosn's alleged dirty dealings with Nissan, this process also shines a light on Japan's legal system which, at first glance, makes the American legal system look like no more of a hassle than a weekend trip to IKEA.

Under Japanese law, suspects can be detained for nearly a month without being charged. They can be rearrested under different charges without being released. This happened to Ghosn several times.