Parents of candidates trying to enter Teikyo University's medical department are believed to have paid more than 2 billion yen a year in a suspected backdoor admission scandal, according to sources familiar with the case.

Staff at a prep school for medical universities, relatives of the university president and brokers are suspected of soliciting anxious parents for huge "donations" ahead of the announcement of test results.

The money was distributed to the private university's affiliates through several bank accounts at a branch of a major city bank in Tokyo's Itabashi Ward, where the university is located, and the branch manager took direct care of the account, the sources said.