“Chinese ships sailed into Tokyo-controlled waters on Tuesday as Beijing celebrated its National Day and as Japan and the United States prepare for talks on their defence pact. Four vessels from the Chinese coastguard entered the 12-nautical-mile territorial waters of the Senkaku islands at around 9am (0000 GMT) and stayed for about six hours before leaving, the Japanese coastguard said. China calls the islands the Diaoyus and says they belong to Beijing.”

Source: Chinese ships in disputed waters on National Day: Japan | GulfNews.com