The Japanese government received communications from the United States regarding US military bases in Okinawa. These communications included the US view on certain issues related to the bases.

Information about per- and polyfluoroalkyl substances, or PFAS, found near the bases was part of these discussions. The US conveyed its view on this matter to the Japanese government.

Further details about the US view and the discussions between the two governments are available from the source, which reports that Japan failed to disclose this information.