The report, which Sato is scheduled to present to the UN General Assembly on Wednesday, states that those detained included demonstrators, government critics, human rights advocates, lawyers, journalists, teachers, artists, and members of ethnic and religious minorities.
According to the report, state television aired confessions widely regarded as having been obtained under coercion, sometimes just days after the individuals were arrested.
The report examines developments from February through August 2026, describing how the armed conflict involving the United States and Israel coincided with domestic repression in Iran, with the two situations intensifying the harm experienced by the population.