Anti-Japan protesters (L) clash with riot police in the southern Chinese city of Shenzhen on September 18, 2012.
China has warned Japan over the landing of two Japanese on a group of disputed islets, amid more anti-Japan protests across China over the islands claimed by the two economic heavyweights and Taiwan.
Chinese Foreign Ministry in a statement on Tuesday described the “illegal” landing of two Japanese activists on the islands as a severe provocation and a violation of China’s sovereignty.
"The unlawful landing of the Japanese right-wingers on the Chinese territory of the Diaoyu islands was a gravely provocative action violating Chinese territorial sovereignty," the statement said.
"We urge Japan to take effective measures to stop actions that might aggravate the situation. And meanwhile, China preserves the right to take further actions."
Two Japanese activists arrived at waters near disputed islands, known as Senkaku in Japan and Diaoyu in China, by boat and then swam ashore on the islands.
Japan’s Maritime Safety Agency, however, confirmed that they left after being warned by coast guards.
This is while, thousands of anti-Japan protesters marched on the Japanese embassy in the capital, Beijing, demanding a boycott of Japanese products.
The demonstration came after several days of protests across the country with armed police forces deployed to the scene to curb the violence.
The protesters massed outside the Japanese embassy in the capital, hurling stones, eggs and plastic bottles into the embassy compound.
Japanese consulate in Shenyang also came under attack after angry protesters threw bricks and stones into the consulate building, broke the windows and set fire to Japanese flags.
Japanese companies, including Honda and Toyota, were obliged to suspend their operations in China on Monday after their factories and stores were attacked and damaged.
The long-running row between the two states over the sovereignty of the islands flared up after Japan announced that the country had purchased the islands from their private Japanese owner.
The islands would give the owner exclusive oil, mineral and fishing rights in surrounding waters.
Analysts say Tokyo has been enjoying Washington’s support in its island dispute with China, because Japan represents the regional interests of the United States.