An office worker was arrested Monday on suspicion of phoning Showa Women's University in Tokyo and threatening to kill its employees, the Metropolitan Police Department said.
Itaru Watanabe, 34, a resident of Setagaya Ward, was quoted by the Tokyo police as allegedly saying: "I got angry because (the university) canceled its informal promise to hire me. I made about 50 calls."
The police are investigating further to confirm Watanabe's confession.
The university in Setagaya reversed its unofficial decision to hire him in January 2006 because he lacked the necessary qualifications to be a lecturer, according to the police.