Japan’s Foreign Ministry said Friday that about 3,600 sets of personal information may have been compromised following unauthorized access to one of its networks.

The records contained names and email addresses, including those of some 900 individuals not employed by the ministry. They did not contain confidential information, the ministry said.

The unauthorized access to the ministry network was detected on July 27. The access was immediately blocked and measures were taken to invalidate credentials.

Following an investigation by outside experts, the ministry concluded that personal information may have been compromised. There have been no reports of leaked personal information being used.

The network targeted in the unauthorized access was connected to external networks. However, confidential information is handled on a separate network that is closed.…