TOKYO (AFP) - Four Chinese government ships entered territorial waters around Japan-controlled islands at the centre of a dispute Monday. The marine surveillance ships were seen moving within 12 nautical miles of the islands, known as the Senkakus in Japan and the Diaoyus in China, just before midday, Japan’s coastguard said in a statement. They were still inside the zone at 7 pm (1000 GMT), with Japanese patrol boat crews telling the Chinese ships to leave the waters, a coastguard official said.Japan’s foreign ministry lodged a protest with the Chinese embassy in Tokyo over the incident by telephone, a ministry official said.