The Tokyo Family Court has decided to place four former students of Keio University's department of medicine arrested on rape charges under probation, it was learned Wednesday.

The four youths, all 19, have already "received social punishment in such forms as being expelled from school; they have apologized and made efforts to compensate the victim," according to presiding Judge Hiroshi Furuta.

Thus, there is no need to place them in any institution, he added.

The four, along with another 23-year-old Keio medical student, had dinner with a female college student in Tokyo's Shinjuku Ward on May 6.

The woman filed a criminal complaint, and the four were arrested July 5 for alleged gang-raping her at an apartment in the ward after dinner.

However, the woman retracted the complaint after a compromise settlement was reached with the former students. The oldest student was not indicted, while the case regarding the remaining four was brought before the family court.

The university, one of the nation's most prestigious private schools, expelled all five effective Aug. 2.