Toyota sold 7.4 million vehicles around the world in the first nine months of the year, up 28 percent from a year earlier, but its strong growth faces headwinds from a sales plunge in China that could unseat it as the world's top automaker, The Associated Press reports.

Anti-Japanese sentiment flared in China after Japan nationalized tiny islands in the East China Sea, called Senkaku in Japan and Diaoyu in China, intensifying a territorial dispute. The move set off violent protests in China and a widespread call to boycott Japanese goods. The islands are administered by Japan but also claimed by China and Taiwan.

Toyota's vehicle sales in China dropped to about half of last year's levels in September to 44,100 vehicles from 86,000 the year before. In August, Toyota sold 75,280 vehicles in China, down 15 percent.

Toyota reclaimed its crown as the world's top automaker from General Motors Co. in the first half, selling 4.97 million vehicles globally. That marked a turnaround Toyota, which had suffered setbacks in recent years from massive recalls and natural disasters.

Toyota, which makes the Prius hybrid, Camry sedan and Lexus luxury models, had planned to sell 1 million vehicles in China this calendar year. But the company no longer expects to achieve that number. It has not given a new target.

Over the first half of the year, Toyota sold about 300,000 more cars and trucks than GM did. Initially, that kind of lead was seen as large enough to make it difficult for GM to catch Toyota in the final six months of 2012. GM said it sold 4.67 million vehicles during the first half.

Both companies have said in the past that they don't care about the global sales leadership and are focusing on making profits. But the sales crown is a matter of corporate pride for both automakers.

Toyota's production was hit by the earthquake and tsunami in northeastern Japan last year and then by flooding in Thailand. Its sales were also dented by massive U.S. safety recalls, totaling more than 14 million vehicles since the quality control problems emerged three years ago.

GM was No. 1 in world auto sales last year. The U.S. and China are GM's two biggest markets. The Detroit company was the top-selling automaker for more than seven decades before losing it to Toyota in 2008.