A man in police custody in Japan has been sentenced to one year in prison for stealing slot machine tokens worth 20,000 yen (gambling is illegal in Japan. . . cough. . . cough), even though authorities have no idea who he is.

The man — identified in court as “Detainee No. 11 of the Katsushika Police Station of the Metropolitan Police Department” — refused to state his name, address or nationality and remained silent on why he did not want to provide the information during hearings at the Tokyo District Court. His lawyer also said that the man had not revealed his name to him.