Juntendo University is suspected of having discriminated against female applicants to its medical school, sources said Monday, in the latest in a series of similar revelations about the manipulation of entrance exams at universities in Japan.

The Tokyo-based private university possibly curbed female enrollment at its medical school by assessing their scores against higher passing thresholds, the sources said. The education ministry has asked for an explanation from the university.

The ministry surveyed 81 universities across the nation in August after similar manipulation was reported at Tokyo Medical University.