A survey conducted in both nations found that 53.4 per cent of Chinese envisage a future conflict, with more than a fifth of those saying it would happen "within a few years", while 29 per cent of Japanese can see military confrontation.
The findings come ahead of the second anniversary Thursday of Japan's nationalisation of disputed islands in the East China Sea that have formed the focus of tensions between the Asian giants.
The survey was conducted by Japanese non-governmental organisation Genron and the China Daily, a Chinese state-run newspaper, in July and August.
It questioned 1,000 Japanese aged 18 or older and 1,539 Chinese of the same age range in five cities: Beijing, Shanghai, Chengdu, Shenyang and Xian.
In the annual opinion poll which started in 2005, 93.0 percent of Japanese respondents said their impression of China was "unfavourable," worsening from 90.1 percent last year and the highest level since the survey began.
"The most common reason for the unfavourable impression of China among the Japanese public was 'China's actions are incompatible with international rules' at 55.1 per cent," Genron and the China Daily said in a joint statement.
That was closely followed by "China's actions to secure resources, energy and food look selfish" at 52.8 per cent.
The third most commonly-given reason was "criticism of Japan over historical issues" at 52.2 per cent, while "continuous confrontation over the Senkaku islands" came fourth place at 50.4 per cent, it said.
Despite a huge trade relationship and their deeply interwoven economies, relations between Tokyo and Beijing have seen several periods of deterioration over recent decades.
