China's commerce ministry has called on Japan to take "complete responsibility" for any trade impact from a territorial dispute between the two countries over a string of islands it both claims.
Last week, Chinese Vice Minister of Commerce Jiang Zengwei said tensions between China and Japan are likely to harm trade ties between the two countries.
Footage of Chinese protesters surrounding the US Ambassador to China's car in Beijing has emerged, filmed by the dissident artist Ai Weiwei.
Anti-Japan protests reignited across China today, the sensitive anniversary marking Toyko's occupation of the country.
China moved to clamp down on anti-Japan protests as a number of Japanese firms announced factory shutdowns and urged workers to stay indoors