Sales of Japanese passenger vehicles in China slumped 59.4 percent on-year in October, a Chinese industry group said Friday, as a territorial row between the countries pummelled demand.

Japanese-brand car sales in China -- the world's largest auto market -- fell to 98,900 units last month, the China Association of Automobile Manufacturers said in a statement.

A bitter dispute flared in mid-September after Tokyo nationalised an East China Sea island chain also claimed by Beijing, setting off huge demonstrations across China and calls for a boycott of Japanese products.