Some 79 percent of Japanese and 59 percent of Chinese people believe China will catch up with Japan economically within 30 years, according to the results of a survey conducted in both countries and released Sunday.

But 43 percent of Japanese and 67 percent of Chinese do not have a favorable opinion of each other's countries.

Of the Japanese who did not have a favorable view of China, 35 percent said the increasing number of Chinese illegal immigrants and crimes involving Chinese is the main reason. That was the number one reason and is up from second place in a similar survey conducted five years ago. Twenty-eight percent of the Japanese surveyed had an unfavorable view due to what they considered as China's anti-Japanese interpretation of history.