The Japanese government said Friday it has confirmed China has installed a buoy in the high seas over Japan's southern continental shelf in the Pacific Ocean, in a move that could further strain bilateral relations.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 government has urged China not to undermine Japan's maritime interests, with Beijing responding that i…READ FULL ARTICLE