Bachelor of art graduates in Japan who are strong in mathematics and science tend to earn higher salaries than those who hate these subjects, a Kyoto University survey released Wednesday indicates.

The proficiency gap, according to Kazuo Nishimura, a professor at Kyoto University's Institute of Economic Research, could translate into a salary gap of as much as 930,000 yen a year in the case of mathematics.

Humanities graduates who were strong in science at high school could also earn 600,000 yen more a year on average than those who cited science as a weak area, the survey shows.