Five Chinese including the head of a Tokyo cram school for Chinese-speaking students have been arrested for secretly taking photos of university entrance exams, investigative sources said Friday.

Ding Bin, the 36-year-old president of MK Education & Technology Co., and four compatriots including its employees, are suspected of conspiring to obstruct the business of the Japan Student Services Organization, a government-linked organization that administers the national standardized test.

One of the five allegedly took the test in Tokyo under a fake name and used camera-equipped glasses to take pictures of the Examination for Japanese University Admission for International Students on June 16.