Japan's Education Ministry says medical colleges in the country have inappropriately manipulated entrance exam results.
The ministry surveyed 80 medical colleges after Tokyo Medical University and Showa University admitted to tampering scores.
It disclosed the results of an interim report on 30 of them on Tuesday.
It says multiple colleges admitted to discriminating applicants by gender or age and giving preferential treatment to offspring of alumni.
It says some schools required applicants to put their parents' occupations on application forms and asked about family environment and financial status in interviews.
But the ministry did not disclose the names of these colleges, or how many there were. It says the query is ongoing and the schools should voluntarily come forward.