In a sign of systemic flaws in the nation's law schools, the Justice Ministry announced Tuesday it has filed a criminal complaint against a law professor for leaking questions for this year's bar exam to one of his students.

Koichi Aoyagi, a 67-year-old professor at Meiji University's law school and a prominent scholar of constitutional law, was one of 132 experts appointed by the government to create questions for this year's bar exam, which was held in May.

Results of the exam were announced Tuesday and 1,850 out of the 8,016 applicants passed.