https://phys.org/news/2019-01-ghosn-court.html

The hearing is "a dialogue between the lawyer and the judge, and the prosecutor is not required to be present," said Yasuyuki Takai, a former investigator at the unit that arrested Ghosn.

The judge is likely to give a brief explanation for Ghosn's detention, and the Constitution mandates that the accused be permitted to speak as well.