OSAKA -- The manager of two cram schools in Osaka Prefecture was arrested Thursday on suspicion of beating and injuring a university student he had hired as a teacher, police said.
Between late July and early September, Norihiro Nishiguchi, 32, allegedly caused injuries to the male teacher, a first-year student at Osaka University, police said, adding that the victim is still being treated.
Nishiguchi, a resident of Toyonaka in the prefecture, reportedly admitted the allegations.
Nishiguchi has been on probation since receiving a suspended sentence two years ago for extortion and causing injury to another college student he had hired to teach at his schools.
The two schools are part of a cram school chain based in Ikeda, Osaka Prefecture.
In October, the manager of another school in the same chain was arrested on suspicion of abducting an elementary school student in Itabashi Ward, Tokyo, and demanding ransom.
According to police, Nishiguchi assaulted the teacher, blaming him for a decline in the number of students enrolled at the cram schools.
Nishiguchi also confined the teacher at his home, forcing him to clean the house and do other chores, police said.
On Sept. 2, the teacher collapsed on the street in Ikeda when he was handing out leaflets for the school. He had bruises on his head and was suffering from internal bleeding, police said.