Nipponica

Chief Cabinet Secretary Yoshimasa Hayashi told a news conference it was "regrettable" that China has set up a small buoy in the waters off Japan's western main island of Shikoku and north of the southernmost Okinotori Island "without explaining its purpose and other details."

The article later says that the alleged purpose of the buoy is for tsunami monitoring but an email or two to Tokyo would have been a nice gesture. A similar buoy was installed around the Senkakus last year.