A 26-year-old officer at the Metropolitan Police Department's Kitazawa Police Station in Setagaya Ward accidently leaked internal documents, including information on investigations, onto the Internet via the Winny file-sharing software, MPD officials said Wednesday.
About 9,000 documents, including reports on interrogations, and 1,000 photo images are believed to have been leaked from a personal computer belonging to the senior patrol officer, the officials said.
The leaked data include classified locations of N-system, or automatic license plate readers, and names of juvenile suspects, they said.